heart burn, morning sickness and diarrhea?

Hi,
Welcome to ehealthforum,
The symptoms of morning sickness, heartburn, diarrhea could be few of symptoms suggestive of early pregnancy. The tests done during early pregnancy can show false negative results, as the kits are calibrated ones, so unless the hormone levels in urine reach a certain level, they do not show positive results. If you do not get periods within 10 days of expected period dates, or if you get abnormal periods, or if you develop any new symptoms, or if you suspect chances of pregnancy, you should consider visiting your doctor for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest.
Take care.