Has this ever happened to you?

So, I've never had any spotting between periods nor have I had any spotting during ovulation "week." my period ended on the 22nd, I had random spotting the 23, 24, and 25 ( it's normal for me to spot randomly a few days before and after and period.) we had intercourse on the 24. My ovulation "week" predicted by glow began on the 28th, we had intercourse again on the 30th,,the days before actual ovulation. I cramped a little on the 1st and noticed some brownish colored blood when I wiped after using restroom. This also happened on the 2nd and some this morning (3rd.) it hasn't been on a panty liner or anywhere else, just after wiping and that wad just a few times. Has this happened to anyone else? Is there a chance it could 've implantation. I ask because, I've been on adipex and its harmful for babies. I've never experienced this.