How do you get a sore throat?

Yes, you read that correctly. How do you get a sore throat? I skipped school today (again) because I was anxious about a test in my AP English class again. I had my parents call in for me as sick, and the excuse was that I had a sore throat (just to mix it up because the last few times I called in sick, I had a "stomach ache"). I feel so guilty right now and I don't want to go to school today sounding clear all of a sudden.

Is there anyway I can make myself get a sore throat by tomorrow? What foods do I have to eat that will make me sick? Please don't suggest anything too dirty since I already suffer from OCD. I just hate lying to people, so I'd rather make myself live my lie rather than continue to fake the entire day through my lie. If you can't tell me how to get a sore throat, can somebody at least tell me how to fake a sore throat?