Mental distrubance&unwanted thoughts.

Hello doctor Iam under the stress for the nearly six months and the pocking sensation on my head when I am think about a topic deeply. and my health is in unstable conditions due to my other health issues. iam unable to sleep and control my mind from the instrunsive thoughts and the stress. and the veins near the forehead and above forehead are tingling hardly since from 6 months due to stress and the thoughts from the other my health conditions Will this kindly doesn't affect my brain neurons or the neurons in the mind and I  also feel the vibrations in my head  and under the neck  and also near the region we   say that is small mind strongly as the way heartb beat in the same process Will conditions does not lead to the entire brain neurons damage or the will become mad man of me This problem has raising a lot of fear in me and also causing to the dreams of death of me. Pls please please please please please please kindly give me  solution to solve my risk problem in my life