Need some advice

I know this sounds nuts but I have been extremely paranoid the past few days. I had a normal period... got it when i was supposed to and ended when it was supposed too, but some reason I am so paranoid about being pregnant. I think I keep researching things where people have their period and are still pregnant. I am on birth control and have been on it for over 4 years now. Lately, I have been extremely bloated, feel like I’m peeing a lot, and my stomach is sensitive to the touch. I think I’m just being paranoid but i need some advice, thank!