Hormonal coil (IUS) and lower back pain

Had Mirena fitted to manage endometriosis after a laparoscopy. The period cramps felt worse than when I was on the contraceptive pill before the surgery. Also struggled with depression and low energy. Acne was about the same as before I started the contraceptive pill.

I had it put in at the end of January. Insertion wasn't fun and did hurt but no worse than the period cramps I used to get. Did spend the afternoon in bed. First few months were ok, some period pain but less than before and lighter periods. But as a few more months have passed I've been getting more migraines again. Also my body hair is more noticeable. My mood is mostly stable except now when I'm ovulating or period about to start, I get very irrational and angry. My last period was heavier than I would have had before the coil but hoping that was just a blip. Have also been spotting constantly the last 2-3 months.

First 6 months is an adjustment period so I had plenty of headache and feeling sick but after a while my body used to it and I am fine. 100% contraception effectiveness and no heavy period.