What to do with ph acidity after sex. This is the most painful thing I have ever felt I been with the same partner for 2 years we live together aswell so we have sex pretty often. I don't understand the burning burning sensation I get throughout my entire vagina after sex and sometimes it lasts the entire day and I can't have sex again because of it. I know it's not a UTI because you can tell the difference is there anything I can put before or after so his semen doesn't hurt me as bad? I have tried Neosporin and vaginal itch cream