PLEASE HELP

I have the nexplanon implant and my boyfriend and i fooled around, and he came between my legs but my underwear was on. I'm terrified that I'm pregnant. I was supposed to start my period today and I haven't yet. but, I had a weird period last time where I spotted everyday for a week after my period. he fingered me after that, so I'm kind of scared that it got in me. but I have the implant I'm my arm, so do you think I could be? we didn't have sex, but it touched my vagina.