She is very cute! I would get her spayed for sure!! I use to work at a vet and we would do tons and tons of spays on little girls. I had peanut neutered when he was 4 months at 3lbs. Esp that she is going to need her baby teeth out, and I can tell you pulling the teeth takes about 5 mins!! I have seen it done so many times. ( i was the doc's assit in sx) I would just make sure you trust your vet and make sure all the vet techs are good and they know what they are doing in sx, and if something went wrong the techs are quick to help the doc. dont be scared to ask the hospital about the techs!! If they are certified or just training
I am sure everything will be fine. Spays and neuters come and go all day, thats the most done sx. She will just need xtra xtra post sx care
I would also make sure that all he baby teeth that she is going to need out is there, thats the thing you dont want is to get her sx and her teeth pulled and then have to put her under again!!!