hi,
i agree - your lo does not sound hungry. sounds like things got a bit off track when she was 4 months old (very common) and never got totally "fixed" and now she's hitting early separation anxiety with a vengence.
luke was about 8 months when that hit and here's what i ended up doing with him - helped a lot. i think it's been unofficially named walk in/walk out.
when he woke from his nap early after about 45 minutes, he would roar at the top of his lungs cause he was still tired. i would go in there & soothe him until he stopped crying (pat/shh still worked on him, or you could do pu/pd). when he calmed down, i would turn around & walk out. typically, he'd start crying again. i would immediately turn around & soothe him again. when he stopped, i'd leave. i repeated this until he went to sleep again.
this took close to 45 minutes each time the first 3 days or so. after that, the time it took for me to soothe him dropped dramatically, and within a week he was sleeping normally again.
the main thing to remember is to decide on a plan, and then stick to it. you will both probably cry - you cause you're frustrated, and her cause she doesn't understand why she's awake & why you are changing things. but if you are more persistant & consistant than she is, you WILL succeed in changing her behavior. it is possible. (even if you need to use earplugs while you're in there with her!!
)
good luck & HTH