Sinus Medication Solution

Took my 3 year old to the pediatrician for what started out as a cold weeks ago that has ended up in what he says is a sinus infection. He has been on amoxicillin for 5 days now and I haven’t seen much improvement, except his nose isn’t constantly running. Still has a sore throat and congested head and is very very irritable. Any suggestions?

Just went to the Dentist to have a tooth pulled and he put me on antibiotics to clear up the infection some before he pulls it the pain goes clear up to my sinuses any suggestions on how to get some kind of relief

I’m taking cefuroxime axetil. My only symptom of a sinus infection is hives, and I can’t wait for them to go away.
I take it twice a day for 2 weeks and have taken 3 pills so far.
When should it kick in?