When we picked up the boys I reviewed Rachel's notes about Jax and realized that something wasn't adding up with how long he was on the pump, and how much he puked and how much food was still left over. When we got home I realized he had very little formula left (and I had packed double the amount he needed as a "just in case") and then it dawned on me... I wrote down his recipe wrong.... MOTHER OF THE YEAR! He was getting double the amount of powder in each feeding (I wrote 1cup instead of 1/2cup).
I called Rachel immediately and we were both so happy and relieved to think we had found a reason for the extreme sickness he had. So we'll see how he does tonight and tomorrow, and hope he comes back down to his normal 1-2 vomits a day. With the rate he was going this weekend, he would've ended up hospitalized by the end of this week, so I was rather upset for awhile before I realized my HUGE mistake (I'm really upset with myself).