Hello I share your concern Pink discharge and spotting after unprotected sex might be related of inflammation or infection of the urogenital tract. Bloating again might be related to Aerophagia ( swallowing of air), us elf carbonated drinks, smoking and acid peptic disease If I were your treating doctor I would have put you on anti acidity medicines like pantoprazole or ranitidine group of drugs with antacids for 3 to 5 days and I would have advised for a battery of tests like blood for CBC, blood sugar, urine culture and vaginal swab culture or an ultrasound lower abdomen In my opinion you should take plenty.of fluids which will help.by flushing off the urogenital tract. Hot water bath or hip bath will definitely help you. Maintain good hygiene Best wishes