I Am Having Pregnancy Symptoms, But Test Result Is Negative

ok well, i m having pregnancy symptoms and i ve taken 3 test... one was a urine test by a doctor and they all say negative but i m 2 months late on my period and i m moody as can be... any suggestions? stress this stress that.... i m not stressed at all. i m actually very comfortable with my life right now. my stomach is pudgy, i eat more recently, i always feel drained, my breasts aren t tender... but my nipples are.