Question about the pill

I’m 17, gonna see a ob/gyn in a few weeks so I can get the pill. But I’m confused about some things:

- Can’t it make you get fat? I’m a little self conscious about my body as it is and I really don’t want to gain any more weight. The idea of trying to lose weight is extremely stressful to me (especially in the summer!)

- Aren’t there any other nasty side effects?

I do know most people complain about having to remember it but I already take meds for OCD and allergies daily, and it’s super important that I remember those so it’s just another pill to take, haha.