Period is late ....

I am late , i usually am an average of 28 days . I have been having cm lately slight cramping on left side and getting nauseous while exercising which I never usually do , my since of smell is greater and my resting heart rate is up I am usually 55 to 50 and its up to 80 - 82 .  I haven't gotten period cravings either which is weird for me . Any thoughts or Any body else going through this ???