Afraid it didn't work

So, I'm almost 3 wks out and I'm so afraid the surgery didn't work.  I've been hurting all day, even with meds.  I sit for 2 minutes and it hurts so bad when I stand up.  My husband keeps telling me I'm not giving it enough time, but my body knows it was feeling better just a week or so ago.  Things aren't right, I'm sure.  I feel like I just gave over my body to be eviscerated to have my back fixed and put back together only to not be "fixed".  I know they say the anterior approach for a spinal fusion is best, but I look at myself and I feel like I've been butchered front and back.

I'm so discouraged right now.  I can't stop crying and no one understands.  My poor husband's patience is growing thin and he's been such a sweetheart.  

What do I do?  My doctor said everything looks like it's in place and right, but why do I feel so bad?