Need Help!!

So we tried to conceive this month and thought we did everything right. I’ve take multiple pregnancy tests (now that my period is 5 days late) and all are negative. Right around the time I thought I still had a window of chance (1 day late) my grandmother passed away and I’m thinking now that all my symptoms were just in my head and that’s why my period is late and not because there’s a chance I’m pregnant. Has anyone ever been so physically stressed out and upset that they’ve skipped their period all together for that month? This has never happened to me and now I’m just confused and wondering if we try again next month, how can I know when to time it right? 😢💔