Ovulation bleeding or implantation bleeding?

Hi everyone,

So my husband and I have been trying to conceive baby #2. This past month was my second cycle and we’ve been more sex active than normal but not to the extreme. I had my period on 11/15 thru 11/20. We had sex a couple times before my period as well as after and yesterday (11/30) was supposedly ovulation date. However this morning I woke up with sore breast (mild), and cramping (mild). I went to the restroom and noticed som brown/super light pink discharge when cleaning. Any advice? Have any of you experienced the same situation? And what was the end result?

Btw, my lower back hurts as well which started this morning as well.

Help!!! 😩