Weird tingling/numbness on my left side

Hello!

I have been experiencing weird tingling/numbness on my head's left side. I frankly don't know how to describe this feeling I am having but I suppose these words describe it the best. I have been struggling with this weird feeling for quite a few years now but I never paid big attention to it because it was insignificant. Lately the tingliness has increased and is more severe. I usually don't have problems with this feeling but it is hard to fall asleep because I am forced to sleep on my left side. The reason why I have to sleep on the left side is because if I do so, I do not feel it. I can sleep on my right side but only if I put my other hand on my head. Essentially I have to cover the area on my head that has this weird feeling. Now that I experience it more I am very concerned about it. I have no idea what it is related to? I read some related topics but I couldn't find anything that would describe my problem the best. Some say it could be related to anxiety and stress but I don't think that is the case. I have never had a doctor appointment towards this matter. 

Hi I'd see your doctor first I.know anxiety can cause some very strange sensations and pain but get a medical opinion first to put your mind at rest you my be sent for tests xxxxx

Which doctor should I visit? I have absolutely no idea. 

I think your main doctor at your surgery first then he or she could refer you to whoever they think you need to see. Or your doctor could send you for a ct or mri scan and then take it from there xcxxx

I think you might be developing a tumour pressure build up in the brain could cause that I suggest an immediate ct scan don’t put it off until it’s too late hope you get it resolved soon and it is just anxiety