Seemingly permanent negative effect of meditation. How should I proceed?

After a week and a half long meditation retreat, I’ve had pinprick sensations around my body, mostly around the head area but also around the body. I can feel them much more during meditation and when I’m trying to sleep (probably because I am not moving and it is quiet) but also during daily life as well. I felt them much more intensely (almost painful) during the retreat. Sometimes I am in a situation that makes me anxious the pinpricks also comes in full force. This has been bad mostly because it makes it hard to fall asleep sometimes. I do not remember having these sensations before the retreat. From my research, it seems some number of people have experienced this, but mostly during meditation, and not in daily life. I have not found any appropriate western “scientific” explanation. How should I combat this, short term in making it affect my life less, and long term in potentially getting rid of it? How would you explain this phenomenon? Should I find a teacher to deal with this? If so, where could I find an appropriate one? I live in Canada, but if I could talk to someone through call I would gladly do this as well.