Ugh Why No Period!!!

Krystal

so listen ladies I have really irregular periods so in October I came on the 18th then in November I came on the 24th so shouldn't I have came on the 24th of this month in December well according to this app my period is due in 3 days which is the 31st I think my cycle is 37 days I really don't know SOMEBODY PLEASE HELP!!!!