Can herpes or any stds spread by sharing a pipe? smoked a bowl of weed with some kid then found out he had herpes. should i be nervous?

Depends: Depends on whether, to some extent, it is herpesvirus i or 2. Genital herpes and oral herpes are generally different strains of the virus, although there is a little bit of overlap. If he has genital herpes and you shared a pipe, the odds are pretty low that you could acquire the same virus. If he has oral herpes, however, it is pretty catchy. There are meds, talk to your doc. Other std unlikely.