Helppppp

Just wanting second opinions... I went off my period last Friday. I'm in my fertile window this week. My fiancé & I have been trying for a while now, last night after having sex I went to clean up & when I wiped it had pinkish in it... Could this be implantion bleeding? I know it's not going to happen that fast, but we have been having sex non stop too... I hope so! Just wanting other thoughts on what this could be before I get my hopes up.. Thanks in advance!