Need major help!!!!

If there is anyone out there that can answer period questions or know alot will you please comment and help me?

My questions are I had a period may 6th-9th. Then didn't have one in June. Doctor thinks I had a miscarriage but didn't seem concerned so I dropped it there. Then in july I had a period but it was more of spotting brown and a little clotting. I then a week later took opk to see if I was ovulating and I was but then last Friday I started bleeding again but this time it was kinda a lot of brown and more clotting. No pink or blood at all. I'm not sure what's going on and I just want to get my cycle back to normal. Anyone can help please feel free to comment. Should I take a pregnancy test or no? Or what to do??