lovan help..

[bill123]

my gf has been taking lovan for a good 5 years or so, and suddenly decides she doesnt need to take it anymore, she stopped taking her tablets for about a month, in that month she had no side effects, except a few anxiety attacks towards the end. Because of the anxiety attacks she decided to start taking them again. a week into it she notices her periods are late.

Could her sudden stop of her lovan intake cause a womans menstral cycle to be disrupted??