No pic, because I didn’t know there was an app like this until I started googling after freaking out...

Here’s the timeline - sex day 6, I ovulated day 11, my period was 2 days late (which I know is in the range for normal but it’s not normal for me based on charting the last 13 months) - day 2, I woke up and had a huge clot (bigger than a quarter) then that happened again mid-day, then barely any bleeding. The first one happened in the shower and I had to pick it up because it wouldn’t go down the drain. Day 3, today, when I got up I had another, much larger clot, but no blood came out after, even in the shower. I checked out a bunch of other people’s pic and it looks like what people are saying is uterine lining, but I’m kinda worried still. Thoughts?