Yeah... don't try it. Just get the meds. It may be another kind of tonsil infection.
Once when I was 17 I thought I had strep, but only one tonsil was swelled so I figured it would work itself out. When I did got to the doctor (because the swelling was closing my windpipe) he gave me some drugs and lectured me about tonsil infections.
See, since the infection had started working it's way down my throat, I could have been in deep shit had I waited another week or so. He said the only thing they can do at that point is a surgery that requires making an incision through your neck and lancing it. The survival rate on that is 60/40.
So, yeah. Don't wait to see how deep the infection can get...