It's very normal sweetie. I still kinda have this problem, and I had it with my 4 other kids. Unfortunately it's very common in pregnancy.
Here's some advice on getting a better night's sleep from MedHelp.org and the I'm Expecting app. You can find it in Week 26.
Also, some tips on insomnia from our Symptoms Manual. You can find this in the app by going to the Pregnancy Diary from the home screen and selecting Fatigue from the Symptoms menu. Then click the menu bar in the upper left and select Symptoms Manual to see your symptoms.