help!!!

okay i’m supposed to start the 14th but had sex about 3 weeks ago and i’m having these symptoms: TIRED AS HELL, slightly cramping, vivid dreams, acne, dizzy, my temperature is higher, nausea, my brain is all confused mixing things up, constipation, more headaches, emotional, nipples are tender, and boobs feel kinda heavier.... so tell me what y’all think!!!