Spotting for 13 days!

I am waiting to go to the doctors next Wednesday, but I’ve been spotting for 13 days now!

I was suppose to start my period on the 11th. I have my period every month like clockwork! They are usually heavy for seven days straight.

Well, period due date came and when I wiped I had pink....thought it was implantation bleeding, but nope, negative tests.

Went and got blood work done on day six of spotting and negative!

Took another test today and negative.

Spotting is no where near filling up a pad and it started off pink and is now brown.

Has anyone had a similar issue and was prego? Or had a hormonal issue ?

I would like to hear people’s experiences with continued bleeding.