how lomg till its out of the system? we gave soy milk two days ago and yesterday as his first mornign bottle, we had NW's the first night and last night the amount of gas he passed was ridiculous, he was up for 1.5 hours in the night crying and had other NW's, hes mega grumpy and i think hes also teething molars at the same time, so how long do i expect the upset tummy to last and what can i do to relieve it? so far im doing Panadol and Brauers stomach calm, any other suggestions?