You just got unlucky. Nothing you could do. Better to raise pre-flop and then push on the flop. Playing short stack needs more skill. You need to learn how to compensate for it given the better odds your opponents get in drawing.
Pushing 20 BB with JQs is just dumb. What do you think you will get called by? You got lucky. That ain't skill. Making the right play is skill, winning since you got lucky is just luck. Don't see how you can play like this and be a winning player in the long run. FWIW, I think best to limp in and try to see a flop cheaply. You can flop huge but if you don't, can always get away. Key here for me is controlling size of pot. Assuming you are playing for some time, 20BB simply doesn't allow one to raise and play position (unless you are rebuying back to 20BB frequently). Dont' forget, it is 15% (or more) of your stack!
