The oats are solid and you digest it only after 1 hours or more...
You must take the liquid meal within protein + creatine + sugar and obviusaly the liquid (water or milk without fats) (the milk is better than water for the taste)

With this you don't get sick...

the creatine must take with a sugar surce to favour the abdsorb in the cell..
Who have you told that the creatine must take avoid eat?

P.S. you eat oats whitout milk for brakfast?