My period is a week late. My doctor did pregnancy test blood work and it was negative.

I took b12 vitamin supplements this cycle because I noticed I had short luteaul phase.

I used to ovulate around cd 19-20 and now I'm on cd 34. My cycles were regular from 6 months pp of about 26-28 days

I don't know what happened. Did my periods stop because of b12 vitamin?

Is there a chance I could pregnant?

I'm feeling so sad that my period is not coming and I'm not pregnant. I just want my period to come if I'm not pregnant :(