What is the opposite of guilt?

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What is the opposite of guilt?

Acceptance

Have anyone here also problems with guilt and difficulty forgiving oneself for what happened?

Yes, it's been an ongoing process for me. I agree so much with everything Stranger said.  
I also was able to forgive by reminding myself that we understand life & life-choices backwards.. we cannot know every perceivable 'right-decision' - we make our decisions based on factors at the time, with intentions that things will improve from the decisions and sometimes it turns into the opposite of what we intended. Noone has the perfect blueprint with the perfect choices to make each time. This human experience came with every next-chapter 'veiled'. We need to forgive ourselves for being being human - for being 'veiled' from knowing the results of our choices until after we have made them - for not having all the answers. And the Ra material does strongly suggest that 'all is well' even though from our 3d-perspective, we're squinting through a more limited lens. Your cousin being unqualified to care-take is also not known until she tries (I mention because for your heart to be at ease, the next-step after forgiving yourself, will come a time that will include forgiving your cousin, siblings, and anyone else involved in this completion-process).

Forgive me for referring to something not written in my own words but these words have helped me and others:
We are not our decisions and no decision is wrong because we made the choice with the information at hand.

I also had weird dreams about my mum (I mean recently, after her death), in one she was in an underground tunnel, getting out of her car, and walking (in a “handicapped way”, sort of, one leg was not really working but a lot better than in her last weeks) and I went up to her and gave her bread with olive oil? In the dream I then had the impression that it was ok and I did not need do anything else.
And lately another dream where she was running around the city and I was watching and I remember thinking “wow she can walk really well now, a lot better than in the last stages of her life”. But in both cases I did not talk to her. It was very different when my dad died because he sometimes visited me in my dreams and we would indeed talk.

After the experiences I've had with those who have transitioned, they do not see things the same way that we do - they surrender all the negative-emotions that we in 3d experience and see the full-expanded-higher-perspective that we will also have one day.  I follow the channelling erik blog which has given me many further wonderful experiences with the transitioned - love and expansion (and I'm not saying this to try and make you feel anything one way or another - it's just what came up as relevant when I saw your post).

My friends who have transitioned-loved-ones get symbolic dreams like you had as well - not yet direct-communication but those types of dreams that send you the general message that "all is well". Out of interest, I randomly googled the meaning of "olive oil & bread in a dream" and I know there are millions of dream interpretation sites out there and our dreams are usually unique and symbolic to us - so take what resonates and disregard what doesn't.. it could even maybe symbolize that you were 'care-taking' and she was acknowledging that you took care of her... but here's some interesting ones I found):

• To see or eat olives in your dream, symbolize healing and immortality.
  
• Olive oil in a dream also represents knowledge, wisdom, spiritual guidance, inner light, blessings and lawful earnings.
  
• To see bread in your dream represents the basic needs of life. Bread may signify the positive qualities and great things you have learned on your journey of life. Alternatively, it suggests that you need to rise above the situation or rise for the occasion.
  
• Olives - Because of the mention in the Bible of live branch and the fruit of the olive, it has the associations of peace and immortality. Certainly with healing.
  
• Olives - Because the oil can be pressed from the olive it has the meaning of healing or ease coming from pressure or trial.
  
• To dream of bread may symbolise that our basic needs of love and and support are being, or about to be met.
  
• Bread is used in many cultures to highlight the relationship between the nourishment of the body and the nourishment of the soul.  This relationship means that dreams of bread can often have a profoundly spiritual nature.
  
• Sharing fresh bread in the dream by breaking it with your friends or family reflects the comfortable and good quality relationship.