Golf Monthly

I have about a golf ball size blood clot on the last (supposed to be my last) day of my period. Is this normal
I took 2 pregnancy test this past month thinking I was pregnant. Both were negative. Then after being about a week late, I started and now today out of nowhere I felt this weird sensation and out popped a HUGE blood clot. I’ve never had anything but teeny tiny clots so this is freaking me out. I am 22 and have a 4 year old. My periods are monthly but not really on a date. I may have one of the 1st of the month and wait until the last week of the month before and have another one. Every now and then I skip a month. Is something wrong with me?
BTW it was mucousy too around it. Sorry if too much info…just nervous as we’re fixing to try for baby #2
It kind of sounds like a miscarriage.
But you should REALLY go to the doctor.
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