Late period

So I posted about being late a week ago. 2 days after I was late I took a test bc of stress and stuff and to put my mind at ease. I’m now at day 8-9 I took a test and it was negative again. At this point I think it could be stress... idk how to not stress about it tho... tips on what I should do? Bc I’m not sure if I’m pregnant, if I’m stressing, if my whole cycle is redoing its thing.. etc I just am so confused and scared and lost at the same time If anyone can give advice tips anything it’ll be great :)