So here’s a story with needed advice

Okay, so me and my boyfriend have been together a little over a year now. I’m not on any forms of birth control. We were in my room messing around orally and he was fingering me and messing around with my clit. We do this thing where he runs his dick on my clit while we are making out and we are doing that as we normally do. For about two-three seconds approximately something felt much better than normal. He said he may have been in me (I was very warmed up so I wouldn’t have felt pain or a stretch), we stopped doing that and I finished him off orally. He came about 10 minutes after it may have went in me. I’m in my fertile window. I know there is precum that can get you pregnant. Should I be worried? Please help I don’t want to stress I know it makes it worse!!