Clockwork cycle, but late period

I’ve never been one to post anything on here, but I do tend to read lots of posts relating to me. I haven’t been TTC for too long, about 5 months maybe, and I’ve tried charting, researching, and everything in the book to get pregnant. It hasn’t happened yet, obviously, but every month, my period is like clockwork. I have a 30 day cycle and it’s never a day late. This time, it was, and I am now 2 days late. I don’t want to give my SO false hope, so should I wait for AF, or go ahead and test? If so, how long of a hold should I do since I didn’t use FMU? I’ve been having light cramps, but nothing else besides really watery discharge.