There's no one way to get through this. My son had few symptoms - he complained a little of being tired, but given that he wasn't getting enough sleep, it wasn't surprising. He also complained of muscle aches, but he was running on a team so it made sense. All of a sudden, it kicked in overnight with a swollen face, a sore through, and total exhaustion. He said he had a stomach ache or cramp, but it turned out it was a huge, engaged spleen protruding from his body right under the breast bone. In fact, the doctor told us not to drive him in the car unless it was urgent, and even so, not to use a seatbelt because the shoulder belt went right across the spleen. An accident could have burst the spleen. From there, he got worse, because his throat was so sorry it was bleeding, so the few things he was eating (water, applesauce, soup, bananas) suddenly reduced to just water. I'm not an alarmist by any means, but it was getting very dire.
I don't think you'll find anyone to take out the tonsils while he's so sick. You don't undergo surgery when the immune system is so depressed, and you don't (frankly) remove the things that are supposedly helping to prevent a worse problem. I had enlarged tonsils for many years as a child, and I was never well enough for long enough to have the surgery. Turns out I still have them. But you don't have them out because it's hard to swallow.
We went to cellular nutrition and our son was remarkably better in a few days. We were lucky to have a school coach explain this to us and we never turned back after such an amazing success. My husband and I started doing the same immune system boosting and have never been sick in 9 years. No flu, no cold, no bronchitis, no sinus infections. It took a few months for us adults to get results but we were consistent.
Whether your son takes a month or a year to get well, no one can predict. Sorry, but you will hear a zillion stories, all true, and your son could be anywhere in that range. You have options but you need to get educated and make an informed decision.