Late or off schedule???

Ok, irregular cycles usually. I basically guessed on the days and decided on a 30 day cycle... Well AF due today, and she's a no show. Very nauseous all last week... Nearly fainted Sunday.... Cant tell about CM because we're still doing the BD to cover just in case cycle length/fertile days are off... Very nervous to check. Definitely want to wait a while just to be safe. No spotting, no breast tenderness, and also can't check cervical position, because idiot understand what the world onlooking for. Help!