Implantation or period?

Rachel

I am almost 35 yrs old and TTC for 4 months.

I have endometriosis and had ovarian cysts removed 5 months ago from both ovaries.

My periods are usually VERY consistent and a regular flow once started lasting about 4-5 days.

This month, my “period” started 3-4 days before Glow predicted. (Approx. 10-11 dpo)

I started spotting last Thursday night.

And all day Friday, my flow was stop and go.

Saturday and Sunday I had just spotting.

And today just spotting (mostly pink and brown).

I keep thinking it might be implantation bleeding but all the pregnant tests I took have been negative.

And I did see thicker or clot-like stuff on Friday.

What do you think?