You may have a virus that is causing this (Scarlet fever or kissing disease).
Or your tonsillis are the problem.
My sone had sever Scarlet fever and had terrible white plaques on his tonsils and throat.
My daughter was constantly having sore throat problems and had to have her tonsils removed in the end because the tonsils were diseased.
The tonsils are the body's first line of defence against bacteria, so if you tonsils are OK the doctor will not recommend them to be removed.
Keep drinking plenty of fluids, water and warm soft juice drinks. As well as the medication the doctor gives you, you can also take pain relief tablets like paracetamol. You can also buy from the pharmacist a spray to numb the pain in your throat.
Wishin you a speedy recovery.
I have had strep throat more times than I can remember, once I had it 7 times in 4 months and my family doctor still wouldn't take my toncils out.
Every time I have ever had it, I have a high fever, very swollen glands (very painful), usually nauseated.
And yes, sometimes it would come right back after a week of antibiotics and I would have to go back on meds for another week. At least once I had the full blown Scarlet fever (strep is aka pre-scarlet fever).
Over time I built up a resistance to penicillin and had to switch to erythromyacin and even with that I have to have a higher dose than most folks. Do not stop taking the antibiotics early, I have developed rheumatic fever from doing that but the strep is also worse the immediate second time if you do.