Mirena coil and headaches

Got on really well for first few years but after year 5 the side effects seem to have become more frequent/worse.

Insertion was incredibly painful and had cramping for 3-4 days following. It's mostly been fine and no massive changes apart from excessive bloating and nausea. Since going on the coil I've been diagnosed with IBS which I didn't have symptoms for before so I wonder if it's linked. I had no periods for 5 months and now just really light or spotting for a few days.

I had to come off Mirena after about 8 months and paid to have it removed as the NHS were taking too long. My mood was through the floor, like really bad PMS but all of the time, I hated myself. This lifted almost immediately when it was removed. My periods were lighter but they were also really long, 12-14 days after normally being 4-6. Not much use as contraception if you're always on a period. The biggest side effect and reason for stopping though was heart palpitations. These are not listed on the side effects but a quick google will show you how common this is for women on mirena. They used to take my breath away when i was talking. As soon as I stopped, so did they so I have no doubt they were connected. A horrible experience and such a shame as I really was on the bottom of the list of options having tried most other things and I had really high hopes as this was working great for my sister.