If you had unprotected sex after your period especially when you're ovulating you could be. I would wait another week to see if you're period is late (sometimes sex can interfere with timing) if it doesn't come test again. With a digital test.
I have thesame problem, I missed mine December did test n it was negative. Had a little bleeding on 10 of this month and i have never missed my period before so I asked if there is any solution But no body want to answer my question. I just joined this site two days ago hoping it will be helpful but it's not coz no one is ready to answer me
My last period was dec 6 and till now I havent had one