Welcome to HCM
We understand your concerns
I went through your description. I suggest you not to worry too much. Masturbation
is not going to take a toll on your health unless it is too frequent. The energy utilized for 5 minutes masturbation is almost equal to 10 push ups of 30 meter dash. This can be recovered just by taking rest for half an hour.
about masturbation and its ill effects (actually there are none) may take its toll. The tiredness
you are experiencing is due to the anxiety associated with it. You could be worried that masturbation at this age is not so good, etc.
Hope this clears your doubts. Available for further clarifications.