We had protected sex and I have anxiety attacks now because of pregnancy symptoms

3 weeks ago i lost my virginity to my bf while i was still on my period, he wore condom, and it truly was painful the first few minutes.. we still continued tho until i wasnt able to feel the pain anymore, plus he also mentioned he pre cummed inside but of course was wearing a condom. I was scared while we were doing it so maybe 30 minutes after, i blowjob him instead and when he was cumming, a small amount of it was in my face, near my breast, legs and maybe also in the pubic hair idk.. I immediately showered because I needed to go home and I'm now worried if the sperm was washed down into my vagina when I took a shower. I really had anxiety attacks after all that happened because I'm only just 17 and I associate to pregnancy every symptom that I felt. It's been 3 weeks already and I still experienced frequent urination, swollen breasts, stomachache or cramping or burning, increase of appetite, easily gets tired, mood swings.. i also haven't eaten the whole first week after we did it.. i'm also an irregular that takes me months to have my period.. me and my bf are really scared