Greenish vaginal discharge. Burning while urination. Pain after intercourse. Advice?

I am sexually active, but I haven t had many partners. Two to be exact. I work a lot, in the heat and constantly running around. During work is when I notice these symptoms whereaswhereas at ease I m fine, but constantly thinking about it. I ve been producing light green discharge that has a very strong, not foul. Then, I tend to get a burning sensation after I urinate. Finally, after sex with my boyfriend I tend to be in tremendous pain. Oh, and then a usual abdominal pain , as of now, but that may be due to me starting my period. I have been reading, but everything has the same symptoms. Yes, I will be visiting a doctor, I just want to know what may be happening.