Is it possible to show at 2 or 3 weeks if your 5"4 and 100 pounds
If you're trying to concieve, I hope it all works out for you! :D
First, you haven't missed a period, so you shouldn't worry yet. If you stress about being pregnant, it can mess with your cycle and you could miss your period due to that.
Also, morning sickness, pains, and food cravings would not typically start this early. And NEVER count on 'sypmtoms' to point to pregnancy. Many women never experience anything like morning sickness or food cravings.
Your stomach, if you were pregnant, would not start to show a visible difference for at least 2-3 months after conception.
If it is possible that you are pregnant, wait until you've missed your next period before you test again. Although some tests can be accurate as early as a week before you're missed period, you can be sure to get more accurate results if you've already missed it. If you get a negative result again, but still believe to be pregnant, then head in to see your doc.
In the meantime, try not to stress about it.
Good luck and Best wishes! :)