aww I'm sorry you're nervous.
I would say go ahead and do it!
Maddie is 4 now. We got her from a breeder because she was used for breeding, but they retired her. We've been putting it off because when Tucker's mom got spayed, she turned nasty. Though now his breeders think that she got nasty because of their new baby, instead of the spay. We should be getting her done soon....