What Station_Master said. Just want to add, that you are not even that deep in this hand with the straddle and the big ante and the resulting big open sizing preflop. Essentially this is like a 40BB or so tournament hand, and with that stack size a big combodraw is an easy get it in on the flop situation. So make a C-bet and get it in against a raise.
Even with the dominating flushdraw, which is kind of a worst case situation, you still had a bunch of outs, since both your overcards were live, and you had the straightdraw. So this is not a tough spot at all, its just high variance. But maybe the real issue is
bankroll / playing with scared money? With the 10c straddle and the big ante a reasonable bankroll for this game is around $500.