Vitamin options for bad stomach

With my surgery date being Jan 9th, I am trying new things. I have a very weak tummy now and it gets upset easily. One of my biggest worries with doing the sleeve.  I have tried Atkins shakes and can drink them slow, but they go down with out upsetting my stomach. I tried flinstone vitamins early today, just to get in the habit. I have had a awful stomach since.  where I feel very nauseated.
I am not sure I will be able to get them down. Any other options. We can't take ones that you swallow right? I am not sure what else to try.

Thanks, Linda

Can you drink skim milk? I'm on day 3 and i got the isopure chocolate protein powder. The bag says to use 2 scoops with 12oz of milk. Well I watered it down with milk and used 1 scoop with 10oz of milk. It made it more thin like chocolate milk than a shake and it went down fine. That's what I'm having today too.

I take Centrum chewable multivitamins. They are orange flavored. I can't imagine that they taste better than flinstones though. 

I have a very weak stomach too, and a strong gag reflex.  If you find something let me know, I always end up gagging on protein shakes and liquid vitamins.