Im 19 years old and for the past year or two i've had frequent cricks in my neck which are accompanied by loud cracking noises.

Also,i find when im stressed, i tend to crick/twitch my neck a lot more.

As well as that,for the last couple of months,i've had a stiff right shoulder which also cracks,while the other shoulder is fine.

This could just be due to the fact that i tend to sleep on my right side, but i cant help worrying that it may be something serious.

I've also been able to crack my jaw very loudly by over opening it, leading me to think i may have TMJ.

I've visited the doctor recently who told me i have recurring tonsilitis as well as a fungal/bacterial infection under my tongue,for which im currently taking Flagyl, but he seemed to glide over the mention of neck/shoulder/jaw symptoms,leaving me wondering whether there's something wrong, or am i just being paranoid/anxious?

I'd really appreciate some help.