TMI...possible early miscarriage?

New to the site. Started bleeding yesterday. Assumed it was my period. Around midnight I soaked through an ultra tampon and pad within 20 mins. Went to change and some huge clots came out. Clotting and heavy bleeding continued for about 1 hour. Minimal cramping. Been trying to conceive for a year with no luck. But I’ve never seen anything like this come out of me. Could this possibly be an early miscarriage? Will call docs office once they open but didn’t go to ER cause I don’t have pain. Pics are 2 different clots. Thoughts?