Since you are 5 days late and your periods are used to be regular, there is a big possibility that you are pregnant. The symptoms are suggestive but not conclusive, so to get sure, you should have a blood hcg
test. If the test is positive, you should start Folic acid supplement
intake, and visit your doctor to document a healthy intrauterine pregnancy
and exclude ectopic pregnancy.
If the test is negative, you may either wait another week for spontaneous menstruation
or visit your doctor to prescribe you progesterone
to induce menstruation.
I hope these words were useful to you and good luck.
Dr. Ahmed Bahaa.