So I'm 4dpo..I consider myself an active person, in good shape...today I went on a hike & it was like I hadn't done any physical activity in so long; I was out of breath within 10 mins of my hike and had to stop numerous times to catch my breath! I have also had cramping and my lower stomach is extremely bloated and sore above my pubic bones; has anyone heard that shortness of breath could be an early sign of pregnancy?