So it's been one month and one week since my Mirena IUD was inserted. So far I'm pretty happy with how things have worked out!
I had a little spotting and cramping for the first week but nothing major at all and then life went back to normal and I didn't even notice it! My doctor advised to not have sex for the first two weeks and I actually listened to her for once. So far I haven't noticed anything during sex except that I'm more paranoid about vigorous activity. I make sure we start out slow but overall it hasn't affected us at all in terms of quality/quantity/positions/exertion/etc.
About 2.5 weeks after insertion I started getting mild cramps again and I assumed it meant my period was going to start on time. I went a whole week of mild cramping and didn't get my period (took some pregnancy tests, all negative). One night I actually had a cramp strong enough to wake me up and make me think "aagghhh I've got appendicitis... wait, nope, that's my uterus". But I fell back asleep and was back to normal in the morning.
The week after the cramps, I actually started spotting. I was pretty excited, thinking that this was my overdue period. During this week I had my one month check up with my insertion doctor. She basically just looked at my cervix, saw the strings, did a manual exam to make sure I didn't have any pain, and sent me on my way. I was a little surprised that it was so simple but I trust her and I have you all to help me through this first year so I'm okay with it.
A few days after that I got what seems to be my "real" period. The flow was heavy enough to need 2-3 tampons/day for two days. Other than that week of mild cramping, I haven't had any pain or cramping during my "period", which is a huge improvement over my pre-birth-control-pill years and about on-par or better than my birth-control-pill years.
My question to any Mirena users out there: will my cycle normalize? I'm totally down for the only-spotting periods OR the 6-tampons-and-done periods but it would be a huge bummer to have a week of each plus a week of pre-period cramping for the next 5 years.
TL;DR: I love my Mirena and any side effects I've been having are totally worth the highly-effective birth control and not worrying about taking a pill every day.