Hi!
Yes, excessive alcohol intake can worsen heavy periods by causing dilatation of blood vessels. So yes, if you take beer in excess then yes, the bleeding during periods can worsen. This can however not be the primary cause. Various causes of heavy bleeding which should be ruled out are fibroids, adenomyosis, endometriosis, uterine polyps, hormonal imbalance, thyroid problems and bleeding disorders.
Do discuss this with your gynecologist and get yourself examined. Take care!