I am going through the same thing. 7 days late and took a pregnancy test using early morning urine and it still was negative. my sickness keeps going and coming. i feel cramping in stomach and back and still no af. i guess we both have to take blood.
It sounds like you are probably pregnant but this could also just be hormonal changes. How long ago did you do the pregnancy test? Did you use the first morning urine when you did it? You should probably have a blood test done since they are more accurate than the urine tests. If that comes back negative, have your doctor do some other blood work to see what is causing your symptoms.