I'm 12 weeks pregnant with my first, and I'm trying to get used to sleeping on my left side so I can be in the habit by the time it matters, but it's so uncomfortable to stay in the same position all night! I'm constantly waking up in the night feeling like I have a bruised left hip. I bought an L-shaped pillow so I can sleep with it between my legs but it's not really helping. I'm worried I won't be able to do it when I get further along in the pregnancy. Any tips?