Same here. Sometimes reading helps but it has to be something that doesn't hold your interest. Warm bath with a little Epsom salt may help. Insomnia is the worst during pregnancy.
I am 35 weeks and having such a hard time getting a good night's sleep. Using pillows and making sure the room is on the cold side helps a little. Good luck!!
No reading or activities on your phone or tablet or iPad.... Just read an article about the blue light preventing the production of melatonin which helps u sleep. That being said if u don't read or anything from those devices I would say relaxing bubble bath with very little light to help wind down.
Benadryl or Tylenol pm is safe to take your entire pregnancy to help with sleep