Not sure what’s going on

So for the past 3 days I’ve been getting mild spotting, only when I wipe and only like the first wipe ( sometimes i’ll try again just to see if there’s blood). Fiancée and I have had unprotected sex for about a month and my period is supposed to be due in a week. Yesterday when I wiped it looked like a little more than just spotting and I thought maybe it was just for my period but it only happened on one wipe. Then nothing when I tried again.. I’ve never experienced spotting in between periods so I’m not sure if this is normal or if there’s a chance it could be some sort of implantation bleeding?