Hi,
MY LMP is 19.1.2015,
My period is regular one! 30 Days once. Since my First Menses!
This time it get late near 6 Days!
But No Pregnancy!
No PCOS Problems!
No health issues!
Need suggestions Immediately!

Note:
Last month (before period) took Primoult N.

First if you are only 6 days late, it is too early to really test for pregnancy for many women. Often you need to be 15 days to start testing. Also unless you test with the first urine of the morning, earlier tests are not reliable.

Also, some women, once in a while are very late, sometimes even miss a month. Issues of stress, work, diet, changes in routine can all cause periods to be late or even missed.

It sounds like you just need to relax and wait another week and try test again,

If no period by the next month, and no positive test, visit the doctor for blood test and further testing if needed