Normal procedure for a spay?

So I want to change vets pretty bad, I took my Bull Mastiff in at 5 months, and she was 58 pounds and the vet told me she wasn't going to hit 100 pounds... anyways, we got her spayed and they did not keep her overnight or give her sutures. I have heard that normally they keep dogs overnight and most often they give them stitches. It got infected, and we tried applying hydrogen peroxide to some of the swelling with a q-tip. It bubbled bad so we started putting neosporin on it. She is now 7 months old and got spayed about three days ago. She isn't licking the cut at all and is being a little angel about not messing with it. I am going to try and see if the neosporin works before spending like 50 bucks on antibiotics. Is this normal for a spay?