Sorry that you're having trouble dude, but you're still getting two pops in under half an hour, so maybe just staying hard for round 3 would help - viagra?
Can you train yourself to last longer by slowing down when you jack off? Have you tried giving your self the least amount of stimulation possible that will still keep you aroused, focussing on the sensations in your cock only, and not just the last porn you saw or your wank bank?
In general just try to relax, recognise before you cum, and then stop and change positions. I'd stick to escorts who make you feel comfortable too or even gold standard ones, don't be suckered by any cold hearted romanians with hot pics just yet (if ever).
Something I've noticed is that GFE foreplay with lots of DFK or even just body rubbing, will make me pop very quickly during sex, but in more of a PSE type booking, my cock gets a bit over stimulated right away from the girl's mouth it goes numb, then I can fuck for nearly an hour. It's all good though, I still really like foreplay.