Mirena
birth control
"I had very little issue with insertion and mild cramps after.

NOTE: BREATHE!!! Can't stress enough. Thankfully I have an excellent doctor who coached me thru. I had taken ibuprofen before, and took the cervix softener (whatever it's called) about 8 hours prior. She also numbed with lidocaine. Very helpful so ask for it!
When breathing ask for the doc to tell u when insertion is happening. Take deep breath right before and out. That way the cervix will open to allow for easy insertion. Otherwise it's more so forced and the after pain is greater. 
There's a connection between our jaws and cervix. So don't hold your breath or bite down but breath thru so less pain.
Barely any cramps the following days."