Hello
thank you for your query.
IF the blood and urine
pregnancy tests are negative, you are not pregnant.
Also you mention that you are having regular periods, so i wonder why you are still obsessed with the idea !
What you describe sounds like gaseous distension and
flatulence.
The swelling could be because of
hypertension or renal causes or some kind of
allergy.
Breathless ness is also not normal.
Try having a bland, non spicy diet, small frequent meals.
Avoid
binge eating and oily, spicy, greasy, heavy meals.
Please consult a Physician once more if the symptoms do not subside.
Please forget about the pregnancy for the time being.
Take care