Hello moms, Ives recently been advised by a nurse to switch from enfamil a+ to a lower iron formula so I choose similac lower iron. Since the switch which has only been 12 hours ago, my 3 month old has been spitting up with every burp and its a lot of spit up, it just shoots out. He wasn't doing that before. The switch was due to him being so gasy, he'd be awake all night long in has pain. He hasn't been constipated before so that wasn't an issue like with Manu higher iron formulas. Now I'm afraid this was a bad switch of he's spitting up half his milk all the time. He is still very gasy at night and up most of the night crying. I don't know what to do.