Help, If is a Doctor much better!?!

To be honest, it does sound like pregnancy symptoms, but also could be a variety of different things, it could be an infection, so if you are worried about that factor, i would go see a doctor who can run some tests on you and see what is happening. Sometimes, it may sound strange, but if you are worried you are pregnant, your body can actually trigger some stress symptoms that sound a lot like what you are describing, so i would relax and look at the situation, you missed a period, could be due to stress or pregnancy or it could just be late, the symptoms you describe could just be PMS. If the test was negative its highly unlikely that you could be pregnant, its usually 97% accurate by about the time your period is next due because the HCG levels in your urine/blood are the highest. Just wait and see how things go, if you are worried, take another test in 2 weeks or so, and give yourself something to take your mind off it.

Doctor