Talk to Internal Medicine on Too Much Weakness

i am feeling very weak for about one month and not having morning erections. I feel even more weakness and stress after eating energetic diet like eggs and nuts. in the beginning i thought i have erectile dysfunction but after some tests i find that its just in my mind all the tests were normal. i don't have diabetes or high blood pressure. i am feeling very weak & Stress full and having problem in erections Plz tell me what should i do