Had sex with another man. Days after got sore throat, swollen tonsils, red bumps back of throat. Still there after month. Now nauseous, tired. Help!

Need to see a doctor. It is likely that you got a infection specially if you had oral sex. Need a check up (blood test, urine test, throat culture) to r/o stds, specially herpes infection which can present what you are describing and that has a simple treatment.