Brown Spotting - help!

Jess

Hello! We’re TTC #2, I’m 34 and had a child 12 years ago. I ovulated roughly around 3/18-3/21 and we tried during that time. AF was due 2 days ago and I’ve been spotting mostly this brown-ish stickyness. I’m usually very regular (26 days) and my normal spotting before AF is pink/red. I have slight cramps and a little bit of lower back pain. I also never see brown-ish discharge until sometimes the end of AF.

I’m going to dr. tomorrow for blood work (supposed to be testing hormones). Could this be implantation bleeding?