Sending prayers and extra warm wishes your way for Angel. I understand how you feel and how worried you are. If you trust your vet, then i am sure all will be ok. AprilLove was small too, (she had just hit 3 lbs at 7 months and very small body), when I had her spayed, and I was feeling exactly how you are now. No matter what everyone says to ease your mind, you will still worry

and that is natural and OK to do. Just think about how good it will feel when the vet calls you to tell you little Angel is out of surgery and all went well!! Big hugs and prayers coming from me and AprilLove for you and Angel.