Hi there, I will try my best to help but will require more info.
First of all I suggest you do not try the pc muscle flexes especially when your sexual functions are weak as pc muscle flexes builds the prostate muscle and causes dht to be trapped there which causes p.E
i use to these pc muscle exrecises 200 reps, three times a day. I would do when urinating, when penis was erect and even during ejaculation for as long as possible. It has caused prostate enlargement, p.E=premature ejaculation and essessive precum leakage after any slight stimulation on the uretha which I have to avoid now.
Ok try and limit your ejaculation to 2 times a week and no more for
3-6 months.
Also try taking daily
fish oil 3000mg
borage oil 3000mg
1500mg l-arginine
this prostaglandin e1 therapy invented by Dr.Lin will boost your
prostaglandin e1 which allows for more spontaneous longer and harder erections. It also increases ejaculation refractory time by increasing your semen production rate and semen quantity.
You can get all these products from your local vitamins shop.
May I ask when did you start masturbating? I started chronic masturbating twice a day since age 11 and have suffered severe headaches after each ejaculation session, eye floaters, lack of energy, chronic fatigue syndrome and many more from it.
Also do you drink alcohol alot? Take any drugs?
Try to add more seafood to your diet as this will help you get back to your sexual peak.
So I suggest you limit it to back to twice a week of masturbation and ejaculation frequency. Your still very young so I think you will easily recover your sexual peak with natural healing. Let me know how ya get on.