I don't even know

Thanks in advance. (Warning long and tmi) 
January 9th I had unprotected sex with my ex, he came inside me three times. 12 days later I had rusty dark colored spotting only when I wiped once. I had also been cramping the day before and the day after I spotted. That day my temperature went from 98.5 to 97.3 and it's been rising steadily to 98.3 which it was yesterday. I've been exhausted, a constant headache since before I spotted, boobs have felt tender and nipples are super sensitive, heart feels like it's beating in my ears, I get shortness of breath walking from class at school, I feel like I ran a marathon, my lower back hurts, my stomach feels like I did a hundred sit-ups, my sense of smell is all out of whack, I've been waking up with heartburn and have been so thirsty and peeing every hour. I've taken tests and got a super faint positive on Wednesday and the rest have been negative. It'll be a week since I spotted this Wednesday. Thank you for reading this.