It could be wind, but then again, I'm no doctor.
Try massaging her gut/bladder region in a downward motion to help things pass. If she's feeling better being upright, wedge some pillows under her cot mattress so she's not lying flat. Maybe she's experiencing a bit of acid reflux that's uncomforatble on her eospophegus?

It doesn't sounds like a growth spurt to me though.