Recently a friend has come to me out of desperation about missing her period. She has admitted to me that she has frequently been using ketamine, ecstasy, and occasionally cocaine. Her sleep patterns have been drastically changed and she has been sleeping a lot more. She also is under a lot of stress from moving and battling eating issues. Her boyfriend and her had sex with condoms except for a few times without but he pulled out. Now her period is eleven days late and she's worried. We have been searching online to find out if any of the things she's been doing recently could have potentially altered her cycle but have found nothing online that's been helping.
Any knowledge would be greatly appreciated. Please, no disrespect - she's already had a great deal of it from quite a few people. Thanks.