Ok am I alone in this

Alicia • Got married Nov. 8th, found out I was pregnant 12/9... It`s been a crazy and awesome month
Just found out I'm pregnant and I'm scared to exercise. Well I'm extremely tired so that makes it more difficult. But I'm scared something I do is gonna hurt the baby. Bee been exercising hard core for 2 1/2 yrs to help me lose 125 pounds so I don't wanna stop but I'm freaking out