The dreaded 2ww

Oh the dreaded 2ww (two week wait).  How I loathe thee

My brain is now going a mile a minute with so many questions.  I guess it's only human to wonder why? what if?  I hate having so little control and no answers.

Here's a few of my random questions:

Is the chance of an ectopic higher with a day 3 transfer vs a day 5?  The embryo has more time to float around with a day 3 transfer so logically I would think maybe?

What are the odds our one remaining embryo is even genetically normal ?  If every single other one from the batch was not,  why would this one be?

The biggest question though is what changed?  Why was this cycle so different than our last IVF?  Was it the methotrexate from the fall that caused more of a strain on my ovaries than the average person?  Was it the fact that our trigger shot was a higher dose (they lowered the dosage last time to half because my estrogen was higher,  this time I had the normal one).  We'll probably never know.