6--8 cells is pretty good so you still have 7 in the running! Very good. Unless something really unexpected happens, you will have one to transfer and maybe a couple to freeze as back up.
I think we (IVFers) are worrying too much. I am the same, very cautious and pretty much on pregnant woman diet ever since the start of IVF cycle. I chatted with my colleague and she doesn't believe a thing about pregnancy diet. She thinks eating sushi, soft cheese etc is perfectly fine. She did sorta say i am too paranoid. Well, i think i am already less strict than some! Anyway, I almost wanted to reply saying if one has to go through IVF, miscarriages and heart break to get pregnant, they would do everything to keep the bub. So ya, paranoid much?! Yes, i am.
Edit: BTW, you should stop some of the vitamins i recommended you to take.