For a couple months 4 or 5 months I have had from the time it started a lightly bloody ejaculate and now its dark brown I only masturbate once or twice a week and I stopped for a little while to see if it would pass over after doing research and it got darker to a brown I'm only 14 and I'm kind of worried I hit puberty last year but now its brown what do I need to do?

You need to see your doctor, over-masturbation can effect your prostate gland.

Well I don't masturbate much so that can't be it?

Have you recently had a hard blow to the lower stomach, do you ride a bike constantly? These are only a couple of reasons for coloured semen, and it is called hematospermia which basically means blood in the sperm. I still suggest a doctor visit to rule out any serious conditions, however, it doesn't mean you have an STD and that is a good thing, if that is what you were worried about.

I am offering suggestions from your description; we don't diagnose on AMHD as it is difficult to diagnose over the internet.

Well I skate but don't ride a bike and haven't had a hard blow to the stomach or anything could it be because I don't drink a lot of water?