Jazz I've had "suspected" UTI at every single urine sample I've taken so far (3 or 4), but everytime it's come back clear. Obviously they need to check it, but it seems it's very common to find protein in the urine with no issues at all.
Julietee when your bump is pressed into the mattress it won't matter for the baby. If baby's uncomfy, he will just move somewhere else :) Lots of places suggest putting a pillow under the bump for some extra support, you could always try that!
When they drink the amniotic fluid, they wee it back out, and it all gets cleaned up by our systems as far as I know!
Found this on some american medical website which sounds like what I've read in my books:
"Amniotic fluid is 98% water and 2% salts and cells from the baby. Until the fetal kidneys started working during month four, amniotic fluid is made by the mother’s body. But after month 4, the little guy started to make his contribution to the amniotic fluid by urinating into it.
You heard right. It may not sound appealing to us, but the urine in the amniotic sac is completely harmless to the baby.
The baby swallows amniotic fluid, which then passes through his digestive system, into his kidneys, and back out again to the amniotic sac as urine. In this way, he can practice using his digestive and urinary systems before he’s even born. In fact, doctors can tell by the amount of amniotic fluid whether the baby has difficulty with his swallowing reflex.
By the time he’s born, he will consume up to 15 ounces of amniotic fluid a day."