well you were only in the hand because you were big blind, but on the flop you only had an inside straight draw, which isn't worth chasing unless you have extremely good pot odds, and not worth chasing with the flush draw out. i even usually suggest folding open end straight draws if the flush draw is out unless you can see if for very cheap. even when you hit the straight, always be cautious of the flush, probably dont bet your straight if a possible flush is out unless you have a good read on the player. i'd say check the river and see what the other players do to decide whether or not to call