My lmp August 21 I have unprotected sex on sep 1,2,3 my next periods date is September 19 still I didn't get my periods I didnurine test it came as negative

My lmp August 21 I have unprotected sex on sep 1,2,3 my next periods date is September 19 still I didn't get my periods I didnurine test it came as negative

Yes you are testing too early, period is just due. Wait at least another week or 10 days. Make sure the test is done first thing in the morning with first urine of day.