If you're older, not sure you'd want to go down the hole of immune issues since age is the likely issue. If you're younger, it may be worth a look.
If you only did 2 cycles at Cornell and the other 9 were the more typical, high dose cycles, I'd stick with Cornell. (I'm assuming they used their low dose protocol.) Certainly no guarantee, but if you at least got chemicals at Cornell, you know that you got blasts.
You could also do a consult with CCRM. Historically, I think they had a significant advantage, but I don't think that they're so far ahead of others now. Certainly, they're still one of the best.
After 11 cycles, I'm sure people have talked to you about DE, too.