@Caesardust I have sent you a PM.
That's a really tricky one when you're still producing blasts. I think it's a little bit tricky for the reason you mentioned. I'm going to play devil's advocate. I don't think PGD really makes too much a difference if it's your final OE cycle. You could have transferred them and POAS before you actually get the PGD results. And you could have saved your $1,500....or you can spend the $1,500 and try and get some answers.
If you're not doing another OE cycle after this one then PGD doesn't change too much. Other than possibly getting an answer as to why it's not working with your OEs. If you don't get PGD normals then it may let you off the hook emotionally with your OEs and allow you to move forward with DEs knowing you've done all you can. But how would you feel if they came back normal and they still don't stick? (not that I'm wishing that on you in a million years) Tempted to do another OE cycle?
It's the lap that could change things, esp if NL (if it's him doing it) finds something that can be 'fixed'. A lap would be handy even if you were going to do DE as it may pick up on something that effects implantation and maintaining a pregnancy.
Do you have a gut instinct? I know how difficult the decision is when finances have to start coming into play.