My 5 week old is barely eating 2 oz at a time right now - she weighs 6 lbs 4 oz, so she's still on a 2.5 hour schedule to try to get her weight up. I've tried different bottles, different nipples, checked her mouth - but getting 2 oz in her still seems impossible at times as she either becomes frantic and crying hysterically, or just squirms (not like she's gassy, just moving around nonstop). Any ideas?!!!