Open ended straight flush draw.

If you are dealt 10 J of diamonds in middle position. You raise 4x BB (this is in 10 NL so the blinds are weak) and you get 3 callers.

The flop is Q 9 of dimaonds and a 6 of hearts.
What do you do if you are 2nd of 4 people to go.

I raised 5x BB but then got reraised to 20x BB and then 50x BB...
These were loose people because most everyone is in 10 NL and so i reraised 160x BB (16 bucks)...i thought if anything they would be scared of trips or something.

They both call.
One flips over Q9
and one flips over AJ.

I dont' hit and lose. Should i have done anything different? or it was just 50% chance of hitting gone bad. Or should i have just called to see the turn?

You can expect someone to have a queen here who won't fold to a bet, and who will bet if checked to. I would check-raise all-in. Your oppnent either has to fold or take a big gamble.

I'd semi-bluff looking for a reraise, so I could get all my chips in the middle.