Mowerman, if you knew anything about dogs, that picture is not of a dog becoming aggressive. That is part of play behavior. Monessa, please ignore these negative postings from others. If you want to keep the pup, we will help guide you and answer any questions you may have. If you see something out of the norm with your pup, definitely post and let us know.
One thing I wanted to mention is, although she is small and cute now, you need to correct her immediately if she is jumping on anyone. She will grow very quickly over the next 6 months. Pits are very strong and like other large breed dogs, they can knock someone over very easily. So, if you get a handle on it now, it avoids bigger problems later. When she jumps on your legs, don't touch her but instruct her to sit. When she sits, pet her and say "Good girl, Happy". Give her the attention when she follows your instructions. Do not give her any attention when she is doing something negative. You can also turn away from her when she jumps and say "Off". If you turn you back on her and refuse to give her attention, ignoring her, saying the trigger word, she will quickly learn that jumping up will not get her what she wants. Once she stops jumping, say the good girl words and give her attention. If she suddenly jumps up again while you are doing this, and she will until she learns what you want, turn your back to her and say, "off." It will take a number of repetitions but she will get it.
P.S. I posted this prior to seeing your new post. I am glad Skebo appears to be on the road to recovery.