Should I go to a friends birthday dinner if I haven’t seen her in two years? More details below, any advice welcomed!!

My ‘friend’ hasn’t talked to me for about 2 years. Than she ( friend A) randomly texted me and asked if I wanted to come hangout at her birthday dinner with her and friend B. I said sure. So I got friend A a small gift than I realized that friend B’s birthday is two days before the dinner. So should I get friend B a gift also, or tell them I can’t go that night and reschedule a different night and give them both a gift?

They stopped talking to me 2 weeks before my birthday a few years ago and didn’t tell me happy Birthday. And now I don’t know if a birthday is the best time to see them.

I don’t know what to do and it’s stressing me out and adding to my anxiety:(