Hormonal coil (IUS) and tender breasts

This coil gave me really dreadful mood swings from ovulation time through to the start of my period. I felt really low and anxious, irritable with family, almost irrational about certain things, constantly crying, and passively suicidal. This persisted for around 8 months including months where I didn't have anything difficult/stressful going on personally. It clearly correlated with my cycle, and within a week of having it removed I felt like myself again. I know the hormonal coils work really well for some people - I have lots of friends who use them with no issues. But for whatever reason I am generally quite sensitive to medications and really noticed an effect from this coil. I've gone back to the copper coil which does make periods heavier, but I will take that over the mood destabilisation

Positive - first one for 5 years, protected against pregnancy, stopped periods after about 18 months so saved money on tampons. No significant side effects initially. Set and forget method was great. Negatives - I found the fitting incredibly painful. When I had it changed after 5 years the reinsertion was traumatic and I won't have it again. I suffered with mouth ulcers every month that got progressively worse over time. My mood wasn't bad but it was overall flattened. The new one never settled and I had problems with the threads travelling upwards, I found medical staff across the board (GP, clinic, hospital for ultrasound) very uninterested when I had issues after fitting which was difficult because I was frightened of possible consequences if it moved or they couldn't get the threads to remove it. I have honestly never had thrush so much in my life as I did when I was on kyleena. Noticed more and darker body hair over time.

No periods but developed acne. I also get cysts now regularly (never had before) that burst and hurt so bad that the first time it happened I went to the ER.