I didnt had my period in july , had in august for 4 days really light , now in september i havent gotten i have really bad cramps but i dont have my period only normal vaginal fluid ... in july i did 4 pregnancy test they all came back negative?

Can retest urine: 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.