serious medical question(any doctors or med school lyfers out there)

[bigt2k4]

I have developed a sore throat over the last 2 days that started as a nuisance and right now is completely unbearable. Whenever I swallow I feel what I think is my tonsils getting stabbed. I cannot sleep and those sore throat candies like cepacol and strepsils do almost nothing.
What is the worst this can be and does it warrant going to a walk in clinic @ 11pm? I cant really sleep, this is the worst soar throat I have ever had and I have had strep numerous times(mostly as a child, cannot remember getting it in the last 7 years)