My last period was on 5th july. on 5th august i didn't get my period but got little amount of blood. i had pregnancy test on 28 aug it is -ve. is there a chance i am pregnant and -ve test. i feel little dizzy from last 3 days and suffering from fever?

Can retest once: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A correctly done urine test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon.