growth spurt?

My lo, will be 12 weeks on Thursday, was eating consistently every three hours, up until about two weeks ago. Now it's been ever hour and a half to 2 hours. I figured it was just a growth spurt, but IT WONT END! She just seems to always be hungry and isn't getting her naps in like she used to.. I'm not sure what to do.. I go back to work on Tuesday and am worried that I won't be able to keep up with her new eating demands.. any advice? Have any of your lo's growth spurts dragged on this long?