Is this allergies, a cold, or something else?

For the past three days, I've had a dry, itchy sore throat along with a runny nose. My nose is so runny that it drips if I bend over. I'm also starting to get congested and I'm having trouble talking as a result. In addition, I'm suffering from a fatigue. I slept for over 12 hours and still felt tired! I have tried Advil Sinus and Benadryl for meds, but they haven't worked very well. I have also done tea with honey, eaten a popsicle, and drunk lots of orange juice. Nevertheless, my throat still feels weird. What should I do? What else can I take? I want something that will clear my sinuses and dry up the drainage without making me feel like I have rocks in my head.