tmi: horror

hello, I'm 17 and got my first depot birth control shot last September. I did two shots with a 6 month span, my period's became a lot lighter and then they were non-existent comma and because of a medical disease that runs in my family my rheumatologist wanted me to get off the shot and she prescribed me prestrogen pill, and it made me bleed for almost a full month. I finally stopped that & didn't have my cycle for a month. this month I got it, and it's so freaking heavy. It has never been this bad, like I woke up yesterday morning and it was like a murder scene 😂, so I was wondering if it's because I hadn't had a full cycle and so long that it was just building up and then when I had it this month it was like that for that reason.