Only four fertilized eggs. Would you cancel genetic testing? Should we switch to fresh transfer?

We received a call from the embryologist this morning who told us only 4 eggs were fertilized out of our 9 retrieved at yesterday's ER. We are, admittedly, upset by this news. This entire process has been lower in numbers than we have hoped for so far. We also know the likelihood of all four of those become blasts and all four of those becoming euploids is incredibly low. We are worried at this point about paying a very expensive fee for PGT if, for example, we only end up with one blastocyst by this weekend.

We have been doing some research this morning and have also become concerned about the freezing process for our embryos. All of this made sense when we hoped we would have multiple embryos but the numbers are getting lower and lower. Are there other options for us this cycle? Is it too late for a fresh transfer? Would it make sense for us to cancel PGT and is that even possible at this point? We are overwhelmed and saddened and struggling to know what is the right thing to do in this scenario.

Would love to hear from other people who have been in this situation so far.

EDIT - my personal details: I am recently 35. I had one chemical pregnancy after my third IUI last year. I have been trying for four years but found out at the end of 2023 that I had dozens of polyps in my uterus which I removed in January 2024 - our RE told us it would have been almost impossible to conceive with how many we had. I had another polypectomy in October to remove one that had grown back which was a possible cause of my CP in August. We have no male factor and beyond the polyps, have unexplained fertility. I do have a lower AMH for my age. At my latest AMH test in August, I had 1.22 ng/mL. That was down from 1.36 in September of 2023.

EDIT: After talking with our clinic, we are considering our options for Fresh Transfer. My Endo Lining is actually in the perfect position (which didn't happen in any of my four IUI transfers). I am starting PIO tonight, just in case, and discussing my options with my doctor in the morning before making a decision. My embryos will be day 2 tomorrow and today is the day after my ER. Surprisingly, my body is somewhat prepared for Fresh transfer. But... who knows. We may change our minds after speaking with our doctor in the morning.