as she said some kind of sexually transmitted disease more than likely. my sister has herpes and she gets sick to her stomach before a herpes outbreak. or a serious case of a yeast infection. i had one the whole time a yeast infection that is when i was pregnant. the bump is some kind of disease i would say. my sis ter burns with a herpe bumps also.
Could be trichomoniasis (I know I didn't spell that correctly). Could be herpes. Go to the gynecologist and have them swab you and test you. Hopefully that will help. I have been there, believe me, I feel your pain.