I tried sleeping on my belly for awhile, but I found it irritated my already full feeling bladder.. so I sleep on my back or my left side. I just use a regular pillow bettween my legs to keep me from rolling onto my stomach and it has been working.

I can only sleep on my back (I just can't sleep anyother way!) and did so throughout my last pregnancy. My midwife did keep telling me to sleep on my left side but I just couldn't do it! Luckily I didn't have a massive bump so got away with it but we'll see if I can this time. Anyway my point is I wouldn't worry to much!

i sleep on my tummy, back, left side, right side!! i'm such a wriggler so i'm dreading it when i'm huge and cant get comfy!! x

I try and sleep on my left side, but I tend to wake up on my rhs! I found this on baby centre:

Sleeping on your back puts the full weight of your uterus on your back, intestines, and the inferior vena cava (the vein that transports blood from your lower body to your heart). Lying on your back can also increase the risk of you developing backaches and haemorrhoids, poor digestion, impaired breathing and circulation, and even low blood pressure.

During your first trimester, get into the habit of sleeping on your left side. Sleeping on this side benefits your baby by maximising the flow of blood and nutrients to the placenta. It also helps your kidneys to expel waste products and fluids from your body more efficiently, which in turn reduces swelling in your ankles, feet, and hands.

Try curling up or stretching out on your left side with a pillow between your legs. (And keep returning to that position if you wake up at night and find yourself on your stomach or back.) You can buy a number of different maternity pillows, though you may find that your usual pillows work just as well. Arrange them between your legs, under your bump, and behind your back for extra comfort and support. In your third trimester, you might find that wearing a sleeping bra and a maternity belt will give you extra support and make you more comfortable.

Finally, if lying on your side puts too much pressure on your hips, buy a piece of soft foam. The foam layer goes on top of your mattress and under the sheet for added comfort and air-circulation; you should be able to find it in a range of sizes from most large department stores.

Hope this helps!

Oooh i feel quite lucky now i only ever sleep on my left side though seem to wake up on my back not sure how you're meant to combat ur wriggling once you're asleep?? Ha ha ha!