Perhaps at the very end where my side is more comfortable. I just cock a leg up higher and higher?

I do and always have. With my first I got uncomfortable when my tummy started getting harder so I got a pregnancy pillow which was a life saver for being a tummy sleeper!!! I'm getting to that stage now where I'm slightly moving off my tummy because it's starting to get uncomfortable, putting a pillow under my belly has helped and I'm sure I'll transition to my side soon lol but look into a prego pillow it literally saved me the first go around!!

I sleep on my stomach every night. It's the most comfortable position for me. I'll stop once I feel any slight bit of discomfort.

I was laying on my stomach but then I got scared so stop. I love sleeping on my stomach though :/

Now I sleep on my back

When it becomes uncomfortable for you :) I semi lay on my stomach right through my second pregnancy because that's how I was my most comfortable. I'm still doing it at 13 weeks :)