Herpes can cause a watery discharge in men, yes, but herpes discharge would not be made better by antibiotics – that would be a bacterial infection.
Herpes does not give you cramping in your hamstring or calf no.
At 17 weeks out, the IgG test picks up 92% of HSV 2 infections. If you are still concerned that you have herpes, you could do the western blot but you symptoms don’t sound herpetic to me
Terri