Hello. I need help, advice. On July 17th and August 6th there was unpr…

Hello. I need help, advice. On July 17th and August 6th there was unprotected sexual intercourse. For the past week I've been feeling nauseous (not like vomiting, but light nausea is present), became emotionally unstable, crying a lot, getting angry, laughing hysterically, terrible dizziness, almost fainting, it's stuffy in my chest even with the air conditioner on, my breasts hurt, the areola of the nipples has become larger and seems full. Yesterday, August 10th, they were supposed to start my period (my cycle is 28 days), but they started today, but not like usual: for a day I didn't even use half a pad, slightly lighter than usual