Mirena and air travel

I had minor cramping when I first got the Mirena put in. But, it was much milder than when I get period cramps. I didn't have any trouble with it (unless you count extremely light periods as a bad thing) until I did air travel (cross country airplane flights). Now, keep in mind, I travel a fair amount by car & have had zero Mirena issues from sitting in a cramped position for hours in car travel. Flying on the airplane caused really weird lower back cramping that put my out of a lot of activities. It was quite definitely core muscles cramping severely, to the point of pulling my lower back vertebrae & tailbone slightly out of alignment. After 3 weeks of pain, I finally went to a chiropractor & got realigned. This has happened with 2 flights thus far out of 4 (it doesn't seem to happen on short 1 hour or less flights). I have NO idea why this happens. I normally have no issues when flying. The mirena is the only thing that's changed. I can only assume it's the combination of the position when in a plane seat for so long & the mirena. Maybe it's poking one of my fibroids in that position?

Mirena has had zero effect on my PMS. PMS is just as bad as without any BC. My acne is just as bad as it is w/o BC. I guess I need Retin A & Midol. LOL

Things to keep in mind when reading the above: I've never had a child. I've been pregnant once & miscarried. I'm in my early 30s. I'm a light smoker. I have uterine fibroids. I rarely drink. I have lupus. Some of these things may or may not have an effect on what happened to me. So, keep that all in mind.
Also, as with all of these experiences, keep in mind it's personal experiences & we're all unique individuals. I'm keeping my Mirena because this is the only big issue I've had & I don't travel a lot.