Insomnia

I’m getting really bad insomnia at 25 weeks, my lower back and tailbone hurt no matter what way I lay. I’m still very small and I really don’t have a bump yet. I didn’t get this way until 30weeks with my daughter and she was born 4 weeks later. Is there anything other than Tylenol I can use for back pain and what to use to help to sleep? I’m getting 2-4 hours of sleep and having to function the rest of the day on it.