3-4 week symptoms

beeee • Daisie Annalise born on her due date 12.03.17 at 9:26 21 inches 8lbs 9oz💕
I'm probably about 3 weeks 4days and I am so exhausted. I know it says to stay active but I have a lot of back pain & fatigue and cramping. Anyone else in the same boat? I love having the symptoms but I'm just worried because I want to try to do everything right as I am a FTM