What Causes Burning, Itching And Thick Discharge After Sex?

hi i am a19 year old and i had sex last year june and started back 29th may where my boyfriend break inside of me and i took this tablet called prospino 2 the nxt day and after that i had sex a week after and during sexual intercourse i was getting a pain on my left side so we stop.Then the week after we had sex doggie styling and after that my belly started hurting and i feel lke i couldn'tbreathe he also fingered me in the beach and the next day my vagina was itching and something like cottage cheese was coming out and everytime i washed my vagina with soap it will burn and during this week i've been getting menstrual cramps because my period suppse to come around now and i am also getting white slime discharge with a kind of brown orange discharge an diarrhea sometimes i feel like i am also having fever chills and inside me is very gasy as well.After doggie styling my right side and around my back hurts alotplease help me???!!!!