For me it was because we have a wood stove to heat our house and it was really dry in our bedroom, it just happens because there is extra blood flow during pregnancy
And for the
stress test I had one on Sunday , no ultrasound though, they just hooked me up on the
machine for 30 mins and every time I felt baby kick I had to press a button and they got a paper record of the babys heart beat and kicks, I went in because I was having extreme pain all around my stomach and back and then I threw u