Yellowish green l discharge?? help?

At the start of december I got my period and it lasted 5 days. Immediately the day after I had unprotected , and that was kinda rough. It was with my bf and we have a monogamous relationship. Exactly 6 days later, we had unprotected again and it was rough. For the first two weeks after my period, and after the first time i had , I had brown discharge. I umed it was blood from being rough, but i didnt have the usual white discharge i always have. But now, the brown has stopped and now there's a yellowish green discharge. It has no odor, there is no pain or sorts.. there's nothing wrong at all except for the discharge colour. My next period will start in a week. I really want to avoid going to a gyno. Can you tell me what is wrong???? what i can do?