Do I jack off too much?

I jack off about once twice maybe three times a week. Most of the time I can manage to keep it down to once or twice a week, but if I'm too horny, I'll go over, but I usually don't more than once a day because if I do it too much in one day my dick starts to hurt. I think I start to run low on cum because I might have a lot my first go around, then on the second I only get one drop. And sometimes I shoot but most of the time it only oozes.

As long as you can manage all of your day-to-day responsibilities, you're fine. When it gets to the point that you can't do the things you're supposed to do and you retreat from a normal social life so you can do that, then you have something to worry about.

The volume sounds normal. You'll regenerate gazillions of little swimmers for the rest of your life, but it does take a little time to refuel the pump.

From what you've written, I don't see anything to worry about.

cum regenerates itself, it is impossible to run out.

Just fine buddy keep it up I tried a marathon I did 4 times in a row I was finished in like 15mins!