Progestogen-only / Mini pill and heavier periods

My GP suggested I switch from Desogesterel to Noriday as I was consistently getting break through bleeding after many years of being period free. The first 6 months of taking Noriday were great, with a few days of very light spotting over many months. Then I started to get more regular, painful periods. I persisted with taking it, and after a few months of no period, it's been months of heavy, painful bleeds that last anywhere from 4 to 9 days at a time every 2-4 weeks. For the last few months I've been getting the type of period pain I haven't had since I was a teenager (I'm not in my mid-30s) - the kind that wakes you up in the middle of the night and stops you from sleeping. I'm coming off this pill today.

I had my first postpartum period without any birth control and it was a bit heavier than normal (pre-pregnancy comparison) but not too bad honestly, the cramps weren’t horrible either. Then my second period I had been on Slynd for about a month and it was HORRIBLE, I’m a medical nurse and I have an relatively high pain tolerance but I considered going to the hospital. The first night I was having multiple medium sized clots that my coworker said looked like it was uterine lining, heavy heavy bright red bleeding and horrendous cramps that made me want to vomit. Plus my uterus was contracting so much I think I went #2 like 5x that day alone. Day 2 was slightly better with slightly less horrible cramps but still relatively heavy bleeding and some small clots every hour or so. Now day 3 and I’m heavy bleeding still and now have some sharp lower abdomen pain especially when in the motion of going to sit down or stand up. I’m hoping this stops soon because this has been the worst period I think I’ve ever had and pre-pregnancy I thought I had some pretty bad ones. I don’t think I will be continuing this birth control

Started to take them again and noticed that I've been having breast pain for weeks now, alongside this I'm much more tearful. Period cramps were somewhat unbearable.