Good news—there are definite practical things that you can try to fix your symptoms without resorting to prescription medication. Which is not to say that medication wouldn't benefit you; only your doctor can evaluate that.
The first thing I thought of when I read your post is a nightlight. Do you have a nightlight in your room? They make ones with sensors that automatically turn off in light and turn on when it's dark. One or two of those in the room might help with your apparent fear of darkness. My other suggestion is to think carefully about your "sleep hygiene." This includes getting the TV out of your bedroom entirely, only using your bed for sleep (or sex), turning the lights down dim in your place 1-2 hours before bedtime and avoiding bright screens like computers or smart phones before bed, establishing a ritual that helps cue your body that it's time to sleep such as taking a bath or drinking warm milk, and keeping a regular bedtime and waking time that's consistent every day (even over the weekend). These things can make a huge difference in the quantity and quality of sleep you get. Most doctors will not consider medication until you have tried all of these measures first. The biggest one for your case, from what I can see, is to stop turning the TV on when you get in bed. Television can be very disruptive to sleep, as you're already seeing in terms of waking up the moment it turns off. Sleep experts recommend something less active if you need something to help lull you to sleep, such as reading a book or even listening to the radio at low volume.
If these measures fail to help you, you might consider asking your doctor if you can take melatonin or valerian to help you sleep. Both of these are over-the-counter "supplements" that you can find at almost any pharmacy, but it's best to ask your doctor before starting anything. For temporary insomnia, some people find that diphenhydramine (the main ingredient in ZZZquil and Tylenol Simply Sleep as well as in Benadryl) helps them get to sleep easier and stay asleep longer; this is also over-the-counter, but you definitely should consult a doctor or pharmacist who knows you before starting this. The benadryl should not be used long-term (more than 1 week) unless under a doctor's orders.
Let me know if you have any further questions. Best, H.