Im afraid I might be pregnant.

Alright So me and the boy had sex a week ago. He pulled out but ofcourse thats not a guarenteed prevention method at all. A few days later I started getting really strange feelings in my lower abdomen. The next day I was extremely nauseous with a really bad headache off and on throughout the day. And certain tastes started bothering me that Ive never had a problem with before. Now The headaches only getting worse and Im having severe cramps, a terrible back ache, and Im so tired I dont feel like I can function. My temperatures also staying higher than normal but not fever level. Ive also had a ridiculous amount of white discharge. My periods are so irregular I have no idea when I was supposed to get my next one.
I've miscarried once before but I was in really bad physical health at the time and didnt even know I was preggo.
But I just have a really bad gut feeling.