I think I'm pregnant at 16??

Ok look I understand everyone gets hate on these at some point but I really need some answers. I've been on birth control(pill) for a year now and take it how it's meant to be taken without error. I understand the side effects of birth control and everything but I just feel different overall. My boobs are itchy, my backs been hurting and I feel a little sick to my stomach and have headaches on and off. I pee probably 5 or 6 times a day now where I used to maybe 2-3. About 2 weeks ago I was playing in a softball tournament but I got pulled out of the roster for that particular game. I was sitting down and my stomach was kind of crampy and I went to the bathroom and I had a very light tinted pink discharge. Ladies please help me out here! I'm begging because I don't have a trusted adult to talk to me and my mom aren't really close at all. I really just need some honest truthful opinions. I know it may sound dumb and all but I know there's always a chance when having unprotected sex. I really need some advice because I know if I am and I'm on birth control already the baby could be in danger due to some medications I'm on and having extremely high blood pressure as it is😞 I can't lose my child no matter how old I am. Please ladies help me out here! Also please don't think mention anything about my age in your answer I just really need some advice from someone older without any bs😭I apologize for this being so long