Is Pregnancy Possible Despite Negative Pregnancy Test Results?

Hi! So on the 25th of may me and my boyfriend were messing around and we were spooning. He rubbed his penis around my anus (he didn’t insert it or cum) and it lasted for about a few seconds. A few days later i took a pregnancy test and it came out negative. I kept taking pregnancy test every week (i took about 3 in total and they all came out negative) to see if i was pregnant. I was supposed to get my period 3 days ago (on the 15th of june) and i took a pregnancy test again today (the 18th of june) and it still came out negative. Am I pregnant?? I dont seem to be having any nausea, vomiting, spotting, or tender breasts like normal pregnancy symptoms, but I have been experiencing cramping like regular pms. Im at a young age right now and im really worried because I don’t want to be pregnant