feeling dizzy and fatigue outta nowhere😔

so yesterday i been feeling dizzy and then today i was feeling dizzy and fatigue... like a tirednesss symptom.,,, i feel like itz because o my sleeping habits I sleep very late and wake up very late... i have insomnia  but do you think it's the cause of it? .. the only thing that helps me alittle is to lay down and close my eyes ... take a nap.... i tried drinking cranberry juice cuz maybe i have low blood sugar idk