cramps, no period? should I test?

Ma
I was supposed to get my period a couple days ago.  I usually have cramps the day before I get it then cramps during my whole period, well I got cramps just thought I was getting it as usually but days have gone by with slight cramping still but no blood !? . Should I wait a bit longer or take a test? . We have been TTC for 9 monthes and my period has never been more than a day off !