You may remember her in a bad way but remember you were only 7/8 and thats a long time ago. Maybe you are so angry with her for not keeping in contact with you, you only want to remember the bad and have a mental block on good times? Obviously I don't know the full situation so can only guess on that.
At the end of the day if there is still a small part of you which loves your mum you should go for it =]














