Could Delayed Periods Along With Vaginal Spotting Be Due To Stress?

I m 42 and have a 26 day (give or take no more than a day or two now and then) My period lasts 4-7 days and I don t usually spot. I started my period feb 6-11 then I spotted only when using restroom (and not every time) feb 21-27 and haven t started yet. I took a couple of hpts that were negative. I called my doc and he said wait 2 weeks and test again but a missed period is normal (except I ve never missed one outside of being pregnant) should I be concerned-and ask for testing or try to relax and wait it out? It has me a little stressed