Implantation Bleeding?? So confused!

Ok ladies, my and my hubs are not actively trying right now, we're still getting over losing our daughter a year ago at 20 weeks 😢
I started my period on 5/15 (spotting) or 5/16 (full af)  then on 5/31 I started lightly spotting, then it got a bit heavier/red where I felt I needed to wipe for often, then back to light and brown to nothing yesterday. Not due for af until 6/16 and we've been doing the deed pretty frequently.
Please tell me there is no way and it's just a freak thing lol.