What should I do?

Olivia • Baby S -coming sept 2019🤰🏾

I am 9 days late on my period today (Monday 4/2) never been this late before. I took like 3 test few days ago (Thursday 3/29) and it said I wasn’t pregnant. I have one friend telling my to go to planned parenthood and get checked, I have another friend telling me to not worry about it for another week or so. . But I’m 9 days late... so I’m worried now! What should I do?