Last month my period was on the 14 of january and this time I had to get it between 13 or 14 of February but till now I have not gotten my period.. I get lots of cramps but no period yet I'm never late.. Took a home pregnancy test and comes out negative.. I've had 3 high risk pregnancies with miscarriages at end one at 11 weeks second at 13 weeks and third at 16 weeks.. What should I do? Should I wait a week before going to the doctor?