Is it a miscarriage? (Somewhat graphic wording)

So about a month and a half ago I was having all these pregnancy symptoms and my period was late. Then a week later I noticed this dark red jelly clump thing in my underwear, pinkish blood when I wiped then what seemed a heavy period a few hours later, was in so much pain. The night before I had pains in my belly. I took quite a few tests but they were all negative. Now the same exact things happened. Period was 11 days late according to my tracker. Experienced pregnancy like symptoms. Had pains last night in my belly then this morning woke up to pinkish blood when wiping then the jelly red thing and what looked like clotted blood and now I’m in so much pain with what looks like a period. Took tests during the 11 days and all negative??? I had had sex both times this happened with a risk of pregnancy...just confused what’s going on with my body and if anyone’s experienced anything like it??? Are they early miscarriages, that had already terminated so my hb was normal, just my body hadn’t gotten rid of them yet? Or could it be something serious? I’m not signed up with the doctors since I just moved house so can’t really pop in and ask them.