N.M.
I'm pregnant with my 3rd baby in less than 3 years and always get pregnancy insomnia. Here are some things that have worked for me.
1. earplugs. Good ones, inserted properly. The tiniest noises wake me up when pregnant. I didn't realize that's what was happening at first.
2. when i was really desperate i would switch locations. go to a couch, guestroom, whatever i could find. that one almost always worked
3. and finally, a very costly suggestion. a temperpedic mattress (i may not have the spelling right. after spending a night in a hotel on one after weeks of pregnancy insomnia, my husband found a floor model for half price. the best gift i ever got. especially since being pregnant is my full time job.
4. light reading before bed.
I wish her luck.
N.