Period....

Camille • 20 years old with a 8 month old daughter #normalizebreastfeeding
Why was my period 7 days late? I've never been that late before. I don't know what to think. I thought I was pregnant cause I was having a few symptoms and I thought it was implantation bleeding but now my flow is red and not a light pink/red or brown no more?????? Has this happened to anybody? Should I take a test in another week just in case?