The scenario that can occur with menstruating women: A woman who has a regular, consistent cycle has her usual discharge and she clears after her usual amount of days. What should she do?
She makes ghusl and is able to resume all previously prohibited activities.
Is there any evidence of the scholars’ limitations of the minimums and maximums of menses?
No, there is no evidence. Ibn Taymiyyah pointed this out. If there is no evidence for limits to cycle lengths, why put a limit?