@Youngblood Unless you are feeling just terrible, I would suggest you give it a couple of days for your body to adjust. My first few days drinking Huel I felt bloated and over full, as well as had some slight gastro-intestinal issues. It all cleared up within a few days and now I have never felt better.
Also, make sure you are easing into it (try 1 shake/day for the first week etc.) and you can always try less Huel in your shakes and gradually increase (I typically do 80-100g instead of the full 127g per serving).