Precum pregnancy?

Blake
Okay, I've asked this question before, but I deleted it out of paranoia. I'm a virgin. I haven't had penetrative sex. However, my boyfriend and I grinded naked about two weeks ago. There's a chance that some precum could've slipped inside, I suppose. He did not ejaculate before we grinded, nor did he ejaculate during or after. I've looked into this extensively, and it seems that the chances of pregnancy are low, but, I am a very anxious person in general, and this is driving Me crazy. Also, when we were grinding, it was on the second to last day of my ovulation. My period is two days late, but I did just increase my dosage of medication. Can anyone give me any advice? Is there a chance that I could be pregnant, or am I worrying over nothing?