Sleep. Help!!!!!!!!

I haven’t been able to sleep but few hours over last week and a half. I’ve tried melatonin been through about half a bottle during this period., sleep sounds galore. I’ve changed my diet and began exercising. Eating at certain times and ceasing liquids past certain times. I am on the brink of sleep and just stay there. I am going crazy. I am on lamotrigine for seizures since sept. Not until recently have I had this issue. I called my dr. Office to see if they would prescribe something to help me sleep. The dr. Who keeps rescheduling a month at a time. They refused until I saw dr. Feb 18 is wh n I’ll hopefully have this appointment. What do I do? I am scared I’m going to have seizure hallucination this event and anxiety is off the charts. Last time it happened I was screaming for my mom as the shadows swirled around the room and two upside down spinning pyramids in my hands. Please help me