Talk to your Dr, there are medications that are considered safe to take... from my last pregnancy i know how bad it can really get! i didnt know there was anythign to take so i just delt with it, personally im not sure if it gets that bad again that i would take something or not... and its hard to say if your sleep patterns will change again here and go back to sleeping without help because it is still pretty early in the pregnancy....
For me last time at the end i didnt sleep more than 45 min at a time and i was wide awake for a good 2-3 hours inbetween... in total i didnt sleep more than 4 hours each night... but the up side was when baby arrived my sleep improved!! a lot! which isnt what you normally hear lol
Dr oked me to take unisom which also helps with the morning sickness. Also small amounts of benadryl are ok.