Hello I appreciate your concern All these symptoms are related to imminent menses, you need not to.worry Since your pregnancy tests are negative than it could be premenstrual symptoms I would like further information to guide you better Date on which you had unprotected sex is there any discharge per vaginally? In my opinion you should take ibuprofen and anti acidity medicines Multivitamin supplements Maintain good hygiene just relax have adequate sleep for at least 8 hours thanks for your question follow up questions are most welcome Best wishes