miscarriage? TMI pics included

[Powell510]

I had 4 blazing positive OPKS in the first week of May. Then Sunday I started (what I thought was) my period. Then last night I passed a clot about the size of my Palm with a small round piece of grayish tissue (second pic) then this morning as I was getting up I coughed and the other big clot fell out (second pic) and this one was full of grayish tissue. I don't have any HPTs on hand but do have some more OPKs and it was another blazing positive.
I'm PRETTTTTY sure I miscarried by the clots and the pain I was in last night but would love some feed back