Throat still pain after antibiotics.

I have had severe throat pain since last week. Noticed a small bump near the right tonsil area. I also have chills and feel feverish. Went to the Dr. They checked for flu and COVID which comes -ve. Tested throat culture and results didn't come yet. Dr said that bump near the tonsil looks like a fluid filled bump. he didn't concern about it much. Told my ears and throat looks red but not infected. Gave me steroids injection and prescribed augmentin antibiotics. I started antibiotics on Friday night. Next day was ok.  Today I feel more chills and feverish. Along with more throat pain. The palm and foot are feeling very hot and body feels chilly. Temperature is normal but body feels very chills and feverish. Is it normal to feel more sick after starting the antibiotics? I am not sure if I need to get another opinion. I am feeling sick more than before. It's the third day of antibiotics and not feeling better today. Does it look like tonsil abscess? Thanks.