what sort of dx am I looking at

[SoDiana]

About a year and a half ago I passed a round teabag sized clot into the toilet. Rang aunt nurse who spoke to gynae nurse and said that since I had no pain it was not a mc. But get checked out. Which I didn't.
Fast forward and I have spent the past eighteen months with abnormal bleeding ie bleeding 21 days out of 30.
Went for smear about six weeks ago. All clear.
Passed another large clot about three weeks ago. And another this morning.
Bleeding bizarrely happens every morning only with bright red blood.
Then I get a heavier more period type bleeding maybe once a month.
Gp has sent two referral letters at this stage.
While I await this appointment have any of you experienced similar and if so wgat was the diagnosis