Hopefully, the worst is over. Henny will calm down and maybe the e-collar won't bother her so much. I suppose all dogs are different, but some don't bother their incisions much. I wouldn't take any chances on trusting her though without constant supervision, especially at first. Maybe some others here can offer more insight on the e-collar. My dogs have never used them.
Henny will be in my prayers, as you will be, I know this is a difficult time for all of you. {hugs}