Puppy in General Chatterboxing

We got a puppy. I paid more then i was hoping for. but still oh well. Supposidly shes a pure bred pitbull. She could be, she could be a mutt. No telling. Shes about 2 lbs. They said 6 weeks. My mom thought maybe 4. I picked her up and she tried to nurse on my hands. They said she had been weaned at 3 weeks and had been on solids for 3 weeks. She wasnt CHEWING on me, she was sucking. So i went back in the store and got a bottle and puppy formula and sure enough she sucked it down. I got some puppy food and ill soften it with the formula too. While she was sucking on me, it didnt seem like she had THAT many teeth in her mouth. I could feel them, just not a heck of a lot enough to chew on hard food. I dono. Shes too young for puppy shots, At least 8 weeks. Too young to be fixed, 12 weeks. Shes just so damn tiny. lol. She did however fuss and i took her out and she peed and pooped in the grassy area. yay for that. Now to teach her to potty in ONE spot only.