Not neccasseraly, no. It could mean you have some spots on your stomach or the opposite. My stomach itched once, and I put on a stone. I quickly went on a diet and lost 10lbs - fast!! So it could, but it could mean something else. Check it out.
that you drank it too fast...
yes
When it get swollen it might be that she is pregnet
When someone blushes and gets a fast heartbeat when they meet someone or are at least near them it means they are in love.
As fast as possible
a hard stomach and twin periods in one month mean you have twins on board.
It can mean how fast something gets from point A to point B. OR It can be used as slang for drugs. cocaine I think. :/
if you mean are stomach muscles used when you are walking then yes depending on how you walk it you walk fast with arms going up and down with each step then yes
By increase I believe you mean the pH gets more acidic. The stomach is full of acid that is very low on the pH scale, and the lower in the pH scale, the more acidic Hydrogen bonds become. So, basically the more acidic the pH in the stomach, the better the food can be broken down (decomposed).
maybe you're bloated? there could be something deeper than that though...you should definitely see a doctor asap.
Stomach