Baby problems...YIKES

So my daughter has had an on off fever since last Thursday (been giving her infant Tylenol). The doctor says there's nothing wrong. I can clearly see she's not feeling good of she's in pain.  My fiancées aunt is telling me to take her to Hershey Med emergency room, since they deal with babies. Her poop is very very runny and green. She's not sleeping a lot. And she doesn't eat all of her bottle. Any other suggestions?