Welcome to HCM.
Birth control pills are simply synthetic hormones that interfere with normal ovulation and thereby prevent pregnancy
. However, depending on whether your inherent hormones are normal or no, stopping OCPs may affect your menstrual cycle. Usually, a lady using OCPs (for whatever reason) may get back to normal cycles in 2 months. However, for some it may take long. If one has been started on OCPs for irregular menses, discontinuing them may bring them back to stage one. At times, it may mess up a regular menstrual cycle.
It would be prudent to check Thyroid profile and a pelvic USG to rule out Hypothyroidism
that are most consistent with delayed and irregular menses. A visit to your gynecologist is recommended. Following diagnosis and advice, you may get back to us with any further questions.
I will be available at firstname.lastname@example.org