No, irregular periods or completely having no periods does not cause any harm to your health or put you at risk for anything.

Furthermore, having lighter, irregular, or no periods at all while using a contraceptive method does not affect your fertility if you decide to stop using contraceptives later on.

Lighter or no periods are caused by the hormones in contraceptives that thins out the lining of your uterus, which is being shed during your period.

Source:

https://helloclue.com/articles/cycle-a-z/is-it-okay-to-use-pill-to-skip-your-period