For heaven's sake, see a doctor. You don't want to be peeing all over the place and making a mess! If this is a new problem, not a lifelong issue, it indicates something has changed in your body. What is the matter with seeing a urologist? What if you have some kind of partial blockage in your urethra, or your prostate is acting up? I can't imagine this has to do with too much masturbation or can be completely solved with herbal remedies.
Saw palmetto berry and hawthorn berry extract capsules would be helpful in improving your flow of urine. You can get them at most vitamin shops, drug stores or online.
were u masturbated a long time ? if so then there is your problem