Need Help & Answers??(Pregnant?#2)

i posted recently, but now i’m posting again and hoping that more people see this. a rundown of what’s been going on: i’ve been having unprotected sex with this guy for a month now. for the last two weeks i’ve been overly tired, had headaches for reasons unknown, had a hard time eating at some points, and had a hard time eating certain foods. my period was supposed to be here three days ago, but it still hasn’t came yet. i am also discharging a kind of thick, yellow substance from my vagina. i’m in college so i won’t be able to get to a clinic until about a week. i also woke up this morning and began to experience diarrhea. what is the possibility that you guys think i am pregnant?