Don't want to get my hopes up

Alright, so I've been having some light cramping lately, and like a picking feeling in/around my uterine area. I had sex during ovulation but my fiance pulled out. Today I had some super light spotting, thinking my period was maybe just starting 5 days early, I didn't think to much about it. It was light pink and then light brown. Only a couple of small drops. My periods are usually regular some times maybe a day late but never early. I also noticed a fluttering feeling in my uterus later in the day when I laid down for bed. (I know even if I were pregnant it would be way to early to be the baby) but wasn't sure if it is a sign of implantation. Any opinions on if this may be signs of implantaion or not would be greatly appreciated!