8dp fet transfer

Last July 2009, I have my first FET. It was sucessful , but I ended up miscarring at about 9 wks. : (
I then had to have hystoscopy to "clean" out my uterus in October of 2009..Which according to my RE, I had a lot of build up that he was unable to see on an ultrasound. The RE also said it was a good thing because it showed a reason for my miscarriage.

I was FINALLY able to do another FET on February 15th, 2010, and I am 8dpt of  2 embryos

My question is.... these embryos had only 2 cells at time of transfer.  I was wondering if anyone knew how much of a sucess rate we would have with them?  They were very "clean" just only 2 cells. : (   Last night I did have to get up 2 times in the nite to pee.... which I never ever do, and my (.)(.) are very, very sore. I'm sure that can be from the medication. i am on 10mg of est. a day and 600mg of prog.  These are the same symptoms that I had back in July of 2009, but I am just curious because our last embryos were 4 cells.  The embryos were frozen on day 3.  Can anyone give me advise or share the experiences?  I do not go for my first bloodtest until 3/1/10, and I refuse to do a HPT before, as I am way tooooo scared! (I didn't do one the first time either). The 2ww is the worst!  I think it is worse then last time, because I knew I was pregnant the first time.