Feel very tired after masturbation. Me.

Hello Doctor. One year back I used to masturbate regularly. I didn't had any problems. From past 5-6 months after masturbation next day I feel very tired and get pain near my kidney area at the back. And I will be having mild headache.and mild chest pain. And I will have pain beside bladder area. I consulted nephrologist and physicians. And cardiology too. Nowehere problem detected everything was normal after having get done many tests like echo, TNT, many times ecgs. And many times abdomen and pelvic  ultrasound. No problem was seen there. But I  feel pain. And I am very much worried about that. Now I avoid masturbation regularly. I do it like once In 10 days. Still it is the same. I get pain. What should I do. Please help me...