I have unprotected sex on june 6. Later this week i saw a yellowgreen stains on my breif so i decided to seek medical help, june 20. Then the doctor tested me swab a cotton buds on my penis. It appears i was negative on the result, then the doctors tell me that i have to continue for medicine to be sure because i have a discharged on my penis. The doctor gave me a shot on my butt through (syringe) and gave me a two oral meds docycycline and metronidazole. After a day taking the meds i have a symptoms of diarrhea it was dark green with some yellow in color. Should i be worry of these symptoms? Can u help me thanks