I go through bouts of it myself. I am on some new meds that I only take part of the time because they are so damn strong. The stuff makes me sleep about 12-14 hours and if I have to wake up sooner, it is very very difficult.
Something I do is purposely stay up all damn nite one day out of the week and get rid of old bills, checks, paper work, and do some light housekeeping so that I don't wake up the bird. The next day, I try and keep caffeine to a minimum and just slug through the day. Once it is time to hit the sack, I usually sleep like a rock and this lasts about 4 weeks if I am lucky before the insomnia kicks in again. By the way it is not PMS, it is lunar. PMS is triggered by the moon and has been for thousands of years.