11 Days Late No Sign of a Period

My period is now 11 days late according to Glow. It’s never super regular but also never this late. Took a digital test two days ago that said not pregnant which helped me relax A LOT, but I get super nauseous like with my first two pregnancies, which has me starting to get nervous again. My husband blew his nose the other morning and I almost threw up. I work at a daycare and when I change diapers, even just the smell of pee has me wanting to gag. Not sure what’s going on, any advice or knowledge on the situation would be greatly appreciated!