Watery period?

(Long Post) I dont know whats wrong with me. After stopping Depo, Octotber 2015, I didnt get my period back until February 2016. Then is was coming every 2 weeks. I got pregnant in Apirl, miscarried in May-June. Got a real period back in the beginning of July. Then from there on, everything was 28 days, right on time.

Expect my very last one before the one Im currently on. It came on time, but then a week later I was bleeding again for 9 days! And this current period came a week late and it is super watery. It just pours out of me and it has tiny clots all in it. I havent seen clots since before Depo.

--Side note, all my periods since they came back after depo have been really on the bright red, watery side.

I saw a doctor Friday and she took 4 tubes of blood for testing. Anemia, Diabetes, Thyroid, and another I dont recall. She also ordered a sonogram, but my appointment hasnt come up yet.

Im just worried there is something wrong with me and thats why Im failing to get pregnant. My grandmother had endometriosis and had a hysterectomy. And my granddad had to have half of his thyroid removed.