How to treat Strep Thoat?

I woke up yesterday with a soreness in my throat, and then I wake up this morning with a full blown strep throat session. In the morning it was horrible, but now it has become a little bit more bearable. I started coughing up yellow phlegm/mucus some time in the early afternoon. I woke up feeling hot and shivering for a short while. Then I took a cool shower to prevent myself from overheating. I have white patches on my tonsils. I need to know how long this would last and what can I do or use to treat this before the weekend because I have plans to out the whole weekend.