In addition to medication:

Can you hang this in your bedroom window: (This is a 6-pack; I buy mine at Home Depot for about $6 for a single one.) https://www.amazon.com/Original-Blac...arkening+shade

The shade is incredibly helpful for darkening my room, and totally simple to hang. No tools involved, couldn't be easier. Each shade lasts about 6 months.

My other suggestion is that you listen to binaural beats (music) before going to bed, or as you're lying in bed.