Gave her a pacifier today and it seemed to be what she needed. I wanted to try and hold off until she reached the one month mark (to reduce any nipple confusion) but I can't sit around all day and be the pacifier. I'm fairly confident she was using me for that and not so much for the nutrition. Also, the AAP says that pacifiers may reduce the occurrence of SIDS so that's good.
Oh and she's back to being her awake self. She just went down after almost 2.5 hours of awake time. I think yesterday was just a tiring day for her.