implantation?

i’ll just start off by my bf & I have been having unprotected sex, due to any BC i’ve been on have done horrible with my body, anyways basically he’ll cum and then put it back in with cum still around the area. and we have sex almost every other day, or every 2 days. nothing rough, just regular sex.

I ended up getting this on may 5th, thought i was gonna start my period. But then the next day, and the few days after that as well as today (May 11th) nothing, no period, no spotting. Which is very unusual for me to have this at the beginning of my period.