I'm pretty much in the same place as you, Catrin. The session with the LMT helped, but for a day or two afterward, my *left* side started spasming. While it has bothered me occasionally, it's the right side I have the issue with. Now my left shoulder is giving me fits, but this has been an issue since I started cycling, and even before.
But, using the lacrosse ball on my spine, hips, and shoulder is keeping it at bay. I am living in fear that I have a real disc issue, but, I also sit all day, and all of this really started when I changed careers. I do get up and walk around every 45 minutes or so, but basically, she told me that my scoliosis has caused my body to compensate, in a not good way! She was the first person that acknowledged the curvature as the reason, which I have always thought.
I will be taking my 2 lacrosse balls in the ski sock with me to Portugal, and hopefully, I won't suffer too much. I'd be interested in hearing how you progress.