hi everyone

i am 29 years old and married for one and half years.i am trying to get pregnant since last four months but did not get success but what i felt by the time i started trying my period got irregular.earlier it was 28 days cycle as well as lasts 3 to 4 days but from 4 months it comes 1 week early and it lasts only one and half days.....i went to my gync,she took all my tests and said everything is normal....
can anyone help me please if she could also went through this problem.......am i not ovulating because of my irregular period......is this the reason i am not getting pregnant.......i am very worried...

i will be very thankful if anyone can help me