Welcome to HCM
We understand your concerns
I went through your description. I suggest you not to worry too much. From the description it is clear that you are healthy. 5 feet 8 inches and 84 KGs are good proportion. A bit over weight though. But that could be your muscles and bones.
You are also confessing that you masturbate 4 to 6 times a day and it destroys your concentration and you are worried. Masturbation
is not a sin. It cannot suck your health. But the worry about masturbation can disturb you. I think that is the trouble you are having now. You are loosing your concentration and feel sleepy because you are being lazy, not tired.
You might need psychological counseling
., I am more than happy to provide telephone psychological counseling through healthcaremagic. Contact me through customer care, www.healthcaremagic.com.
Hope you understand. Available for further clarifications.