Starting to wonder...Maybe I'm pregnant

Erica • Student
So lately I've been under a lot of stress,and my period is late by,possibly around 20 days or so,maybe more.I was working 6-7 days a week 12 hour days so I can't honestly remember.I have taken a pregnancy test but it was negative.I have no idea what's going on with me,it could be stress but I'm not sure.Ive had one or two symptoms of being pregnant but they were there for maybe a few hours then they disappeared.I really don't know what to do and I have no insurance to be able to go to the doctor.