Confused, is this abusive or normal? Please help...?

I think you have lived in a household with a lot of conflict and from that there have been moments that have gone over the line into abuse. Your mum and dads life has obviously been a difficult one for them to end in divorce and your mum seems as if she has been very stressed out about it or found it hard to deal with. As a child you can get caught up in the middle of it all and be confused about matters. I think that part is pretty normal. You sound a bit lost, but you do know who you are if you find the simple things such as you are a 15 year old teenager who is growing up from being a child into a young woman like any other at your age. I think the divorce was difficult for you. They can be very stressful hun.