No period!?

So I’m 10 days late for my period. I’m always very regular... after 5 days late I took a pregnancy test and it was negative. Although I didn’t really need to pee so it wasn’t a proper one if that makes sense? I know for best results you should take the test first thing in the morning when you do need to pee. Ive been very feeling lethargic and hormonal. We’re definitely not trying for a baby as it’s not really the right time.... so I’m a bit stressed! I’ve bought another test to do in a few days 🙈 Am I worrying over nothing? Can I have some thoughts pleaseeeee? 😶