First let me say that Hazel is a cutie pie!! Love your avatar picture. I agree it could be from the shot. I also agree that she should be seen by the vet asap. So I would worry yet!! May I ask why she can't stay with her mommy for a few more weeks?? It really is important.
Good luck with her and please let us know what the lump is and if you are still getting her.
Good luck and I hope all goes well with her!
