you probably had more of a chance of getting HCV from sharing the pipe then oral sex. Sharing a pipe has been recently added to one of the ways HCV can be transmitted, even though one of the lower risks still get tested to put your mind at ease.
well i think everyone would agree that this was a "no risk" situation.
regarding hep b: if you are not vaccinated, you might consider doing so - the hep B vaccination is very safe and very effective, and you will never have to worry about Hep B anymore.
also, if you are sexually active, you may want to consider doing routine testing to clear any doubts about any possible infection status. ideally discuss it with a specialist doctor.
cheers.