Could I be pregnant? did you experience this?

It sounds like you experienced implantation bleeding honey. I went through this with my first pregnancy and this one. Although I knew I was pregnant because my husband and I planned our pregnancies. I got pregnant the first try both times. I would suggest testing now because a test would be positive since your period is 3 days late. I tested the day I missed my period and got a positive although it was faint with FRER. I tested the next day and it was positive again but still faint. I confirmed it with a bloodtest and I am now almost 6 weeks. Best wishes to you!