re: Poker & Did I play this poorly?
Why 5bb? In this situation, if any of the limpers was going to call 5bb, how much more could you have bet without significantly reducing the probability of getting called? If he would have called more, say 7bb or even 10bb, it would have been better to make it more. Not that it would change the result; it's better because when an opponent is equally likely to make an error or a larger one, you should give him the chance to make the larger one.
Don't worry too much about giving a bet sizing tell. Many players won't notice or won't remember, and even those who do have to still be at your table in a similar situation (which may not even occur) plus they have to be in the hand to take advantage.