My period is 7 days late !!

Ritika

After my marriage on 5th feb 2017 ,first conception was in mid of september which went unfortunely as a miscarriage and D&C; was performed on 11th nov & i got my first period aft D&C; on 11th dec.Now it should have come on 9th of Jan but today it is 15 and yet no spotting.What i am supposed to do?Shall I go for pregnancy tests?