Liz,
I just came across this. I'm sorry to hear Maggie is having such a rough time after her surgery. Is the area of the incision red and inflammed? Is she still licking at it?

Actually, you should talk to the vet again (not the tech) since it has been 4 days and she appears to be getting worse. She should of been making progress by now. It may be nothing but insist that they check her out. After all this is a long Holiday weekend and you need to find out now instead of having a possible emergency later.

I will keep you and Maggie in my prayers. Please keep us posted.

{{{{HUGS}}}}