Dr. Purushottam welcomes you to HCM virtual clinic.
I have gone through your query.
I think I have understood your concern, I will try to suggest you the best possible treatment options.
I think in this cycle you need to opt for plan B
, because as per your history , your last few cycles were quite regular; and day 10 to 18 are fertile days of the cycle.Though using plan B will disturb your cycle, your purpose of not getting pregnancy
will be served.
I will strongly suggest you to use contraception
in correct and safe way, so as to avoid this kind of dilemma in future.
I hope my answer helps you.