Tinnitus issue! Please help me! To this.

I have been suffering from T since an year. I have gone through these tests: Brain mri, cbc, fbs, pta and ia, all came normal. No abnormalities or hearing loss. Brain mri showed thick mucus in ethmoid air cells. What I feel is the tinnitus is either due to my tmj or growth of a wisdom tooth or some neck issue with scm(m scared about nasopharyngeal cancer). My affected ear is left side, and when i turn my head forcefully towards right and press the SCM (plz see the image) which connects to mastoid i see a tinnitus spike. Also when i press near my temple/tmj there's a spike. Also occasionally i get a new tone of tinnitus which happens in either side of my head. It lasts for around 15-20 secs and go. I am very much afraid if it's a mini stroke, i feel weird sensation in my nerves of hands. Please help me, please help me to diagnose this. I am very scared for cancer or stroke. I want to cry so badly, i am literally broken due to this.