Anxious about the pill

Okay, hi.

I'm finally considering getting on the pill but I'm really terrified of side effects--I've struggled with an eating disorder and I worry any major changes in weight could through off my mental health, and I've heard hormonal birth control pills can worsen anxiety and depression.

Any tips or experiences?

I'm 19 but I have sexual assault related ptsd, so now that I'm finally seeing someone who makes me feel very comfortable I kind of want to be on top of the whole contraception thing!!