Thank you for posting your question here, I will try to answer it to the best of my abilities.
As intrusive as you find going to a gynecologist, in this case you will have to see one. Yes it is likely that you had a miscarriage
and that is why you are bleeding out clots. But there is also a chance that there are fibroids present, so I think at least an ultrasound
So please see a doctor as soon as possible. So that we can find the cause and treat you accordingly.
I hope this answered your question.