My last period 26th dec my cycle length 29 days and i know i have ovulation on 9th jan. suppose to get period on 23rd till now didn't came. i have mild crumps and backache tryin to get pregnancy. is there any chance when should i test?

Can do preg. test: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), 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, and thus lead to a repeat test. If a woman gets her normal regular period, then she is not pregnant, and a test is not needed.