I Went To The Urgent Clinic On The 6th Because

I went to the urgent clinic on the 6th because of throat pain. They said I had an ear infection, and gave me amoxicillin. It's been 48 hours, but I don't feel any better. How long should it take to start feeling better? I also developed a few red spots at the roof of my mouth, and I'm very congested, but haven't been coughing or sneezing, and when I try to blow my nose, nothing comes out.