Im on button with Qd8d9d4s. C/O opens, I flat, BB 3 bets to $19. C/O calls and I call.

Flop is 3 4 8 rainbow. I flop top 2 with back door flush draw to the diamonds.

BB leads out with a bet of $43 into a $55 pot. C/O raises to $188. I have $342 behind. BB has $130 left and c/o has $70 left.

I decide to shove and I get called by both.

BB has AA5J with no flush draws on the board (just an overpair) and CO has 10c6c8h5d for a one pair, back door flush draw to the clubs and an open ended strait draw.

On the flop I am ahead but I am an equity underdog to the CO. The CO ends up hitting his back door flush draw.

Was that a bad play on my end? I mean the board was ridiculously dry and I dont understand how any of the 2 pairs are in either of their ranges so it really just left open ended strait draws or sets which I have blockers to.

Thoughts?