Hey guys it seems I solved the problem.
Difficult to say for sure exactly what did the magic because i’ve been busy working everything from ankles up to neck.
However, one day I started working a lot on my scalenes, upper trapz and first rib, and since that day I have not had any pain. I’m fairly convinced a certain variation of the scalene stretch was what did the magic, so for anyone with similar problems I recommend looking into that area.