I have irregular periods which makes it hard to pinpoint my ovulating cycle, but I am now 16 days late from what should have been my start date for my period. I am normally only a few days early/late, but never 16. I have done a few at home tests and they have all come up negative. I am having some serious cramps today but no bleeding so far. My nipples have been sore a sensitive to touch for about 3 weeks now and I have been a feeling a little bloated for about 3 weeks with small flutters in my lower abdomen. Should I wait a little while longer to take another test or make an appointment for bloodwork? HELP!