Yeah, your flop bet of 20 into a 50 pot with 5 players really got you in trouble here. Truth is, you say you have a lot of outs, but you really have no idea how many are good. A PSB or bigger OTF would have allowed you to guesstimate outs a bit better here. I would probably count the Kings as 1 out, the flush outs as about 4-5, and all the str8 outs, for a total of 11-12.
I ship, of course, but I'm not loving it. If he has A
x
we are still behind and are down to 1 flush out. I think mostly we go to our tournament in a bad frame of mind here.