I eused mirena and oestrogel fir 4 years, just tried using utrogestan since December with view to using it instead of coil.
Used it orally every night, after two weeks I started to get mood swings, anxiety, paranoia and brain fog, felt awful, so switched to vaginal route, better, but not better than coil for me.
Had my coil replaced last Tuesday, a bit of bleeding for 24hrs, but fine since.
After my first coil, I had spotting most days for approx 3 months,
I started off using 2 pumps of oestrogel, but 3 work better for me, and I rub it in well to my inner thighs every morning.