[TakeTheLeap]

Although those are the signs of pregnancy, those signs usually don't start in the first couple of weeks. Your body can't even tell it's pregnant until a few weeks after you conceive, so you wouldn't be exhibiting signs until 6-8 weeks after conception.
You will want to take another test in a week or so. Sometimes 2 weeks is too early to take a test, and sometimes it's not enough time to see whether you've missed your period or not.
These "signs" you've been experiencing could just have developed out of fear of being pregnant, stress from everyday life, or they could be signs of something else. Perhaps it would be best to see your doctor about it - you can get a blood pregnancy test done (which is exceedingly more accurate than the pee stick) if you're still worried, and your doctor may be able to help you figure out what's causing those symptoms.