NOT SLEEPING 😳😫

Sarah • My husband and I are high school sweethearts, teachers, and new parents! Life is beautiful
I am so confused. I'm about 8w pregnant with my second baby and already I'm an insomniac. I do have bad MS during the day but I don't know why I'm not sleeping!  I fall asleep ok but then wake up 2-3 hours later and just lay there. ALL NIGHT. Until my alarm goes off. 
I'm asking my midwife what I can do to help, but is anyone else experiencing this?!