Go and see your doctor. There's no difinitive home test or info that you could get of here. Your doctor will send you to have a blood test or scan.
Hope you haven't but sorry for your loss if you have.
Blood clots aren't usually a good sign...
Go to the doctor duh you think asking us will help if that is the situation
When I misscarried it started off as period lookibg blood and then I had big blood clots come out until finally the foetus came out. Go doctors and find out for sure if its a miscarriage there are some that bleed or have these signs bt it could mean something else other than miscarriage.
Go see your doctor. But blood clots aren't always a sign of miscarriage. I had a few in the beginning of my pregnancy & I'm due soon with a healthy baby.