One week ago I had protected sex with a women at a party...everything seemed fine til afterward: she had a fishy smell BV or Yeast infection I don t know. 2 Days later: Noticed a burning inside my urthrea and tip. 4 Days later: muscles and start ache ...joints start to hurt. Knee and arm. 6 Days later: I start to have diaherra...lots of it. -light green in color. Already tested neg. for UTI. Waiting on lab results for other stds...thoughts?