The terrible twos already?

I've been having such a hard time with my soon-to-be nineteen-month-old. She's constantly throwing those kinds of fits where she'll either glue herself to the floor or go completely limp when I'm trying to put her in her car seat or stroller, and I'm getting more and more frustrated with her every day. I don't remember my son acting like this at all. I think that my daughter just has a double dose of stubborn, as her dad and I both like getting our own way. Whatever it is, I don't think I'll mind when it's over. The scenes are getting kind of embarrassing, especially since she has a habit of making them in libraries and malls...