What Could Cause Premenstrual Illness, Prolonged Spotting, Weight And Hair Loss, And Breast Changes?

Hello. I have been having issues a few issues for the last 6 months. I feel very sick and fatigued the week before my menstrual cycle. I dont get cramps I just feel ill. My periods have been much lighter and only last about 3 days, but for a week to a week and a half later I have spotting and lots of clear mucus discharge mixed with the spotting and still just feel sluggish and tired. I keep loosing weight I am down 20 lbs in the last 4 months. I ve also notice I am loosing alot more hair than normal. I am not on any birthcontrol and I am 28 years old. I weigh 124lbs and I am 5 ft 2 in tall. My brast will swell sometimea and hurt but they return to normal eventually. I do t know what to do and I dont have insurance bit I feel like I only get 1 wk a month to feel okayish. I do take 100 mgs lamotragine a day. I take ambien prn and hydroxyzine prn. I take 300 mg lithium 2 xs a day. Any thoughts or suggeations may help. Im just tired of feeling bogged down and sick. Thank you.