Throat Kills!

I just came back from a wonderful weekend with my bf's family.. I had been feeling better.. I got a little tired and foggy but nothing too awful.. I was able to attend all the festivities throughout the weekend.. Last night I came home and my throat started to hurt.. This morning I woke up, and it hurts even more! Could I get strep while treating with ketek, mepron, and diflucan? Is this maybe a sign that I'm doing better with lyme which allowed some cold/strep to come out?