Throwing up

How far out are you? You should not be eating until you vomit. If you are within the first month or two, you need to follow your NUTs diet strictly, otherwise, you could bust a staple and be in serious health trouble, also, eat and drink very slowly. If you are further out, and are suddenly having issues, you need to see your Dr. ASAP, maybe even go to the emergency room NOW! No matter what stage you're at, it's not ever 'normal' to vomit, ever, and it is typically because you are eating too much or too fast.

I was sleeved 10/29 i go to the doctor on the 29th

Brown stuff can be mistaken for blood. I agree with 920amy, you should go the the emergency room if you are not sure. Getting dehydrated is not good for you either and can also cause more of a problem. You may also need to avoid solids and go back to a liquid to calm things down in your stomach.