extreme flow?

Milan • 28 | Greenville, SC📍| Wife | Mama x2 💕 Lorelei Capri & Layla River
So I was on the depo shot for just 1 round (3 months) and I got my first moon last month since January for 5 days, really normal flow not many cramps. After that we were actively ttc, and weren't successful.
I just got my moon 2 days ago and the first day was a very light/normal flow and yesterday and today I have bled through onto my sheets A LOT and I have CRIPPLING cramps. I can't find my cup, so I'm going to buy another today, but is this normal? Why are my cycles this uneven?