Is this implantation? Red? Pink?

Tuesday, 9/24, trigger shot

Wednesday, 9/25, IUI followed with progesterone (oral)

Monday, 9/30, blood on tp

first pee days after IUI and found blood on toilet paper. VERY minimal to almost nothing by mid afternoon and nothing since. Lots of cramping, aches, lots of burping, some gag/smell sensitivity . Been feeling a lot warmer when sleeping so I wake up often and urge to pee. Tempted to take a test but being as strong as possible to wait out another week.

I also know these symptoms are similar to pms and also effects of the progesterone BUT the bleeding is what throws me!

Thoughts? Tips?