I could really use some advice

How do I stop stressing about getting pregnant. I’m on the combo pill and I take it perfectly. I know that means you don’t really have to use any other form if you trust it. Well I don’t trust it so we always use condoms. I’m okay once we are done and I check the condom and I know that there were no leaks at all. But the other day, we were messing around and the tip of his penis touched my vagina before we had sex and I freaked out cus I’m afraid that precum is going to swim and crawl inside up to my cervix. I know that it’s crazy to think that way but google says it’s possible. Should I worry even if I’m on the pill, what if it’s not working for my body. I’m just so worried and I hate having to wait for my period. How do I stop stressing about my pill not working