kitty re lying on your back its from about 16 weeks - current thoughts are as much about you as baby.
*If you normally sleep on your back, it's safe to continue doing so during the first trimester. But as your uterus (womb) gets heavier in the second trimester, it's best to lie on your side, ideally your left side.
After 16 weeks of pregnancy, sleeping on your back isn't such a good idea. That's because your baby is pressing on the vein that returns blood from your lower body to your heart.
Of course, we all toss and turn during a night's sleep. So if you wake up on your back, try not to worry. Just roll onto your side, and get as comfortable as you can before dropping off again.
It's only if you lie on your back for a long time that the flow of blood to the placenta and your baby could be affected. You may feel faint or dizzy after you have been lying on your back for a while in later pregnancy.
So try to get into the habit of sleeping on your side. Sleeping on your left side is best for your baby, because it helps the flow of blood and nutrients to the placenta. It also helps your kidneys to get rid of waste products and fluids from your body. This in turn helps to reduce swelling in your ankles, feet and hands (oedema).
To get comfortable lying on your left side, bend your knees and place two or more pillows between them. This keeps the pressure off the muscles around your hips and pelvis. Placing a wedge-shaped pillow under your bump in bed can help ease the strain on your back.
You could try using pillows to help prop you onto your left side and to stop you rolling onto your back at night.
Some women find that sleeping propped upright with some pillows helps them to get some rest if they are uncomfortable lying down."
www.babycentre.co.uk/x1047808/is-it-safe-to-sleep-on-my-back-now-that-im-pregnant#ixzz2mQZthxFa
not sure how academically current this in in terms of recent research but seems to reflect what I have found in most places.
Thinking of you funky x x
merk make sure you keep your phone on you all the time, I had to when I had whooping cough a few years ago and would reach stage of being on hands and knees seeing white spots. having my phone to hand made me feel a little better. Hope you get some answers to this soon though - have you had your results? hope you are ok x x