Okay so my SO and I had sex last Wednesday and I noticed it was burning a little so I went to my midwife and she said my vaginal opening is a little inflamed and took some samples. She also said I had white blood cells in my urine so she thought infection. she tested for a bacterial, yeast, stds and UTI etc. all negative. So we had sex again today and it burned a little bit. But only during and about 30 mins afterwards. Has anyone had this happened to them!? I've read it can be because of increased blood flow but am I alone in this?