6 days late

Im nervous asl. I have endometriosis and was told unless i have a laparoscopy it wouldbe hard to become preggers. Me and hubby have been ttc off and on for 5 years "naturally" but only a couple times actively this year (tired of the disappointment) . Fast foward end of October hubby comes up with the bright idea of us taking the men and womens one a day prenatal vitamins together. Im like what the heck why not. So i take those and tried some pills called fertile prep (thins out mucus for easier travling sperm) in combination with the prenatals before during and after my nov period. Im expecting my cycle this time around because as i told hubby even if it does work i doubt its that fast. Here i am now 6 days late nervous as hell expecting my cycle any day now due to the constant cramping and naseau ive been having(which i normally get a day b4 my cycle) . I havent tested yet just bc i hate dissapointment and would rather let it be over a week late b4 i do. But im nervous a HELL bc just pretending that i go past 7 days no period what could be wrong with me that im not getting a period. Ive never not jad one except when i was pregnant youngest is 7. Im so afraid after reading about so many people missing periods and still not being preg that this is the case with me. Like i rold hubby what makes it more unsettling is the factthat we actually tried this New combo for the first time and my body would choose to torture me and prolong my period to get me excited. Its been pretty reg all this time why now would this happen. Ive had no bleeding whatsoever either not even a spot. Any ideas what could be the issue besides pregnancy.