Any medicine over the counter like antibiotics?

I went to the doctor and long story short they had the nurse diagnose me... With mono!!! I don't have it I've read up and I have 1 out of the many symptoms. It's just an infection a girl at school has the same exact thing and got antibiotics for it (she's the girl who got me sick) 
Anywayyyyy what medication is as strong and as fast as antibiotics but over the counter?
My symptoms:
•sinus congestion 
•light cough
•headache (in sinuses)
•sore throat 
•runny nose 
Please help!!