Period late

So my period is 2 days late and I’m not really that worried but I have been awfully tired and constipated. When I mean tired, I mean I wake up at 1 Pm and could take a nap an hour later after waking up, but I’m having troubles falling asleep. And by constipated I’ve gone maybe twice within a week. Coffee isn’t even helping. I haven’t had sex since December 30th and had a period in January. What could be the problem? Pregnant? Crazy? 😂