Implantation bleeding?

I’m not sure what to think of this, so let me give you some details to further assist…

My last period was March 4th till the 7th. Regular period nothing abnormal. My next period was suppose to be around April 4-5th but it never showed up. Come April 15 and I start spotting very lightly, it was pinkish, kinda watery and that was after 11 days of my expected period. It remained pink and spotty until yesterday when it became a little more like light bleeding but it’s still light pink/kinda rusty. I’ve been very nauseous, fatigued, light cramping on one side and have really tender/heavy boobs ever since day 1 of this.

I have an overactive thyroid that i’ve learned of this month, I’m still waiting on further testing to determine what might be the underlying cause of it but I know that causes complications too if I were or wanted to become pregnant (which I do want).

Being that this “period” or light bleeding and symptoms are so closely related to one another, I can’t differentiate them.

The picture is right after I peed so it’s spread around the tissue a bit more but all these days the bleeding hasn’t been enough to cover a whole tampon.

Any ideas, tips, anything! Would be a big help!