I had sex with my partner on my fifth day which is the last day of my menstrual period. Then after we've done I'd still brown/bloody discharge as part of my mens. Then after two days, my vagina is so much in pain, it was like swelling and having a pus-like then I'm having light green discharge. My research says it was an infection, a Trichonomiasis, an STD but my partner do not having any pain in his penis. Is it right? I am so much in pain now. Is this infection can spread throughout my vagina? And an antibiotic does help? Please help. Can't visit a doctor.