Don't stress!! If you feel the tightness in your back and legs and neck its a sign of stress... you usually don't feel lightheaded and off balance in pre**. If you don't get a period in the next 2 weeks do a test, I was told at the doctors that a $1 test works just as well as a $10 one.... One of the first signs of pre** is NOT nausea, its usually tender breasts/nipples and tiredness. If this helps you out any and cheers you up! Nausea doesn't usually show up til the 2 month mark, so that's why I think that its stress you're feeling and it will go away! Good Luck, and please post back whether you get your period or not, so we can celebrate with you!!! BTW--I can tell you the symptoms of pre** cause I have 3 children, help pre** teens, and have sisters who have kids, just in case you were wondering where I am getting my info!
Yea what yrisoj said and stress can delay your period. Just relax
It may be that you are stressing because of the pre*** All I can say is that sometimes menstrual symptoms are almost the same as the pregnancy one. Just relax and wait. If in a week counting the two days you don't get your period take a test. And if it comes out negative go to a gynecologist