It could just be heartburn. I would take this concern to a doctor.
Check out tools from Arcoa Industries for picking up things without bending down.
Do not lift anything heavy, but as far as lots of bending up and down, you will not hurt the baby but you maybe hurt your back.
Screw down = pressure up. Screw up = pressure down.
Should you be flying does barometric pressure go up or down
The chest will recoil after compressions automatically. Just make sure that when the chest recoils, your arms are not resisting the recoil, e.g. your hands should be resting on the chest during the recoil, without coming off the chest.
You can try bending the rod to the float slightly up or down.
Barometric pressure goes down in a tornado.
1: If you trace down between your neck and chest you will find a squishy crater. 2: If you trace down the middle of your chest you will find a fleshy spot. 3: On the center of the top of your head. 4: The part on your bicep that sticks up most when you flex it
The diaphragm moves down, and the intercostal muscles pull the ribs up and out. Both movements increase the volume of the chest cavity, thus reducing the pressure in the lungs. Air flows in from the outside to equalise the pressure.
Round down
Because you're bending down and stretching your muscles.
You can try bending the rod to the float slightly up or down.