Your LMP is 16th Feb and you have not got your period till date.
So first do a home pregnancy
test along with blood test
for HCG to exclude pregnancy.
There are several causes of delayed period like Emotional upset, Stress, Thyroid
problem, Over weight, PCOD. So need to investigate properly.
PRIMOLUT-N is not used as abortion
pill.So don't take medicine without doctor consultancy.
It is better to consult with your gynecologist after check the above result.
For more suggestion,you can mail me...firstname.lastname@example.org