Do you think I should get tested/go see a doctor?

Hi. I’m not the one to google my symptoms and self-diagnose but I just wanted to see what you guys think. I have bad cramps and I mean BAD. My period is only 4 days long so I don’t think that’s a huge issue. I was always skinny as a kid and in teen years. But once I hit 16 I gained a lot of weight without my diet changing. My armpits also sweat and hair grows faster than normal. I don’t know if this is pcos 100% but I guess I wanted to know if any of you went through something like me. If so how’d it turn out? And is seeing a doctor something I should do?