NL straight/flush drawing hand

[Holybull]

Please tell me how bad this is. $.25/.50 NL at Party. I have 18.50 to start.

I'm dealt Jc 8c in cutoff. 2 limpers, I raise to $1.00, BB calls, others call. 4 players in the hand for $1 each.

Flop comes Tc 9d 4c. I've flopped an open ender and a decent flush draw. BB checks, UTG bets $9, MP calls, I call, BB folds. Pot now at $31 less the rake.

Turn brings the Ah. UTG now checks, MP bets $10, I call all-in, UTG folds.

River misses me, it's the Ks. MP takes down a $46 pot with Ac 9s -two pair.

Is this just a bad beat, or should I not have been in this hand at all? All comments appreciated.