I think we're in the midst of another growth spurt as well, Sydney's 7 weeks today and for the past two days she's been eating more often and sleeping a lot less and incredibly fussy. Last night she didn't go to sleep until 11, was up at 2:30, wouldn't go back to sleep until 5 (fed twice and changed her diaper what seemed like 6 times in there), up again at 6:30 (nursed her lying down so I could sleep at this point), up again at 7, again at 8 and finally for the day at 9. Mommy was not very happy today, especially when she woke up screaming to be fed at 9 and at the same time my 3 year old decided to do the same. I took her to the chirpractor and she's finally been sleeping ever since, love my chirpractor!!
Hang in there, the best part is after all this they sleep a lot for a couple days, and they've built up your milk supply so you'll have more success pumping if you want to freeze a couple bottles to have on hand for the occasional night out. I'm thinking I'm about ready for a mom's night out, my mom's group does this every other month, or as often as we need it. Leave the kids with dad and go for a couple hours for drinks and appetizers, where we usually end up telling stories about our kids and sharing/laughing at our "bad mom" moments, it helps when I realize I'm not alone!