I have never been a back sleeper till I was pregnant either...and for the first months, this was the most comfortable position. Now that I am getting further along, I know that I need to try sleeping on my sides, but I to often times wake up on my back. As the other girls have said, it's not a biggie...I was also told if you happen to wake up on your tummy it's not that big of a deal either, but as you get bigger, rolling onto your tummy would definitely be more difficult.

Like Gwen, I got a Snuggly pillow...and am still getting used to it, but currently, it is helping with the head aches, most of the time...so that's good. I hope you aren't worried about waking up on your back now.