Sleeping position

At 7 weeks you're still fine sleeping on your tummy and back, honestly - the main thing is just to switch positions as your bump grows and it naturally becomes uncomfortable anyway. Most of us end up on our sides by the second trimester just because lying back starts to feel a bit off, but there's no hard rule at this stage. If you're worried about it though, might be good to check in with your gynae during your next visit, just to set your own mind at ease based on your personal situation.