masturbation has nothing to do with your penis size. I've been masturbating for years and still have the same size penis. Perhaps you mean your penis not as firm as it use to be. If that is the case, start masturbating moderately and not so often.
I think its about time you took a rest, give your body a rest, as for p***s size you could try taking a course in jelqing, see if this get your size back up to your puberty size, just go to pegym there you will find a start up page, just go from there, do as they say and try to rush it.
Good Luck