Untested embryos

My husband and I have 4 embryos left. We started with 6, the first was a MC (day 6 4AA) and the second we lost her in the third trimester (5BB). I’m worried now that she was the only perfect embryo and have somehow convinced myself of that. We didn’t test these embryos because it would’ve costed us extra and also decided against it because we are young with no abnormal history (27). We both want a big family so I’m praying there’s some from this batch that will stick and get our rainbow baby. We are going to be doing a transfer in January and I want to hear stories of success from those who have had a batch of untested embryos. How many stuck? How many didn’t? What grade were they? Here are the embryos we have left:

Day 6 untested 4BB 4BB 4BB 3AB