arm twitching once a month

I have had muscle twitching in my arms and legs for the past several years.I am 27yrs old.Lately it has become worse. I have gone in for a VEEG for 4 days and it was normal. Usually these "twitching" episodes happen towards the middle to the end of the month. I feel tired and drained a day or two before the twitching occurs. The OHSU doctors claim that it could be due to stress and anxiety. Over the past couple of years these "twitching" episodes have been getting worse. I am on Clonazepam recently but have had to increase the dose to help. I am usually drained several days after the "twitching" episodes. I do not lose awareness and can have full conversations with everyone around me. I do know or feel something right before the "twitching" episode will happen. If anyone has any information that will greatly appreciated.