The, “3-5 days and you’re fine” is a joke but stastically you’ll be fine my friend. I was really bad for a bit while things adjusted, some folks just have a rough time up front. I can tell you I didn’t see substantial improvement for almost 6 months. However once I started getting better, I improved very, VERY fast. I would be 100% fine if not for congestive issues which can be delt with.
Realistically you’ll probably be fine in a few weeks. Relax, play your favorite video game, take it easy, and try some Advil or Tylenol.
Most importantly, stay positive.