implantation bleeding or start of period?

Britni • IVF Momma to be- June 2021🤰🏼❤️

I haven’t had my period in a year and we are TTC so I’m on a steroid to get me to ovulate and get my period. On month 2 out of 3 of the steroid and just went to the bathroom and saw this. I’ve been having weird stomach pains, headaches, cramping, etc. Could this be my period coming or implantation?