Oh Edith, I am so sorry hun! I knew how scary this was going to be for you as we have talked about it before

But you will be so glad when everything is all over with

I will be saying LOTS of prayers for her!
As for the E Collar, I honestly and truthfully see NO need for that at all. Tatum NEVER ONCE wore one when she was spayed. She didn't bother the stitches at all - not once. I know your vet told you to use one (I really don't know why though

) but if it were me, I personally wouldn't do it

She is going to be just miserable with that thing around her neck for 2 weeks straight!

The poor girl!! I would ONLY put one on her IF she bothers the stitches and won't leave them alone...but I would most definitely see how she does first before putting one on her.
Let us know how it goes girl, and how she is doing once she comes home. Big hugs!