I have a 4 month olde english bull dogge, all she wants to do is bite and jump on me.?

I play with her quite often. I let her run around in the yard to get some extra energy out. Even after she comes in the house she tries to bite me and jump on me. I have never had my own dog before, is this normal puppy behavior? She has plenty of chew toys, but rather chew on me. If I tell her NO, she barks at me (as if to say How dare you!) I love her very very much, but Im getting very discouraged, im starting to think I have a biter on my hands, I want her to be able to interact with other dogs and people, but if she keeps this up she wont be able to. Please Help!