Hallow Dear,
The main question is whether you have missed your period! The most important cardinal symptom of
pregnancy is missing a period. The other symptoms you have mentioned are not pertinent to pregnancy.
Apart from the missed period, the other symptoms are nausea &
vomiting, frequency of urination and breast changes. The breast changes include engorgement, tenderness, darkening of nipples &
areola with increase in areolar size and secretions through nipples. In the absence of missed period, these symptoms can occur due to some other causes.
Negative tests can be because of:
1. Absence of pregnancy
2. Test done too early: Urine pregnancy test is reliable conclusive only after 8-10 days after the missed period. Done earlier may be false negative.
Ultrasonography is always a good tool for diagnosis of pregnancy.
If you have not missed period, your symptoms could be due to
common cold, digestive problems or so. Please report in that case to the physician to get properly diagnosed and treated.