<s>[INST] I am 43 and facing the problem of nervousness and lack of confidence some times to extreme extent,especially I am supposed to do the things, which generally leads to headache and weakness in brain and like brain starts squeezing and heart sinking. When life is normal then I do not have any problem. The more I do physical work the more I feel fine. Please define me problem and suggest the solution. [/INST] Brief Answer: consult psychiatristDetail Answer:Hi dear, what ever you describe is due to generalized anxiety disorder but without detail history and mental status examination can not say..there are many medication and psychotherapy by which you may get benefit. Thank you </s>