Feeding Advice--11 week old?

I feel like I am doing something wrong with Taylor.
For the last 2 days, she seems to have a hissy fit at some points 2 hours after eating and the only thing that works is another bottle...feeding her every 2 hours is not easy and I don't know what to do...
I have been giving her 4 oz and she would always go 3 1/2-4 hours without another feeding and at night, she will sleep around 6 hours between feedings. She hasn't gone crazy at night, just in the afternoon and early evening...any advice?

Re: Feeding Advice--11 week old?

I'd try increasing the bottle. It could be the 4oz is not holding her off anymore.