Decided not to take any pseudoephedrine sulfate or guaifenesin today. And no caffeine either. Just too many symptom-masking things lately. I wanted to see where I was without them.
Answer: worse. More coughing, drainage, pain, etc.
I did find some old amoxicillin and started taking it. I think I have 6 days worth. Which means I should go get the remaining 4 days because you're not supposed to stop an antibiotics treatment halfway through. They say that the antibiotics rarely help the actual symptoms but they do help to prevent more advanced and dangerous symptoms from developing. We'll see.
I'm now at the seven day mark and while today was better than yesterday I'm still really feeling like crap.