Live $5-5 NL - Straight/Straight Flush Draw Possibilities - play how?

[HobbyHorse]

Live $5-5 NL. I am CO with about $500. Largest stack at the table is the Button with around $900. Other players average $200-300. This is a rather loose table.

UTG raises to $25 (standard raise for this table). One caller, I call with 4 [img]/images/graemlins/heart.gif[/img]6 [img]/images/graemlins/heart.gif[/img]. Button calls, small blind calls, all others fold.

Flop comes 3 [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/heart.gif[/img] 7 [img]/images/graemlins/heart.gif[/img]. UTG bets $25, one player calls, and I should???

Obviously a very good flop for me but I am worried about a higher flush draw...