Im 2 days late, i took 2 pregnancy test came back negative. i got white watery discharge and cramps. whats going on ?

Late period: well you still could be pregnant as urine turns positive a little later than blood/serum pregnancy test. It could also be that your cycle is just late and you are having some premenstrual cramps. You may have skipped ovulation this cycle also and the watery discharge and cramps if one sided esp. could be ovulation. Check another urine once 7-10 days late