Sore Throat, Cough, Congestion

I've had a severe sore throat, cough, and congestion/runny nose for about 9 days now.  It does feel like I'm getting over it though.  Did I go to the doctor? Nope.  I gave my sister a call (she's a doctor) and seems like I probably have strep throat, but I'd have to get a strep test to find out for sure.  Whatever it is, they'd just prescribe some drug that wouldn't really help and my body can fight it off on it's own anyways so what's the point of going to the doctor?