Thanks for the query.
tablets contain progesterone
which helps in inducing the withdrawal bleeding.
You can take folic acid
tablets from now-onwards.
The remaining tablets you can start taking after your periods start.
If same irregularity repeats in future go for physical examination and ultrasound
to find out the possible cause for your problem and take treatment accordingly.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429