Do I really need to work out????

I had this vision of being the ultimate fit preggo but let me tell ya....I'm a restaurant manager and work 45 hours a week on my feet basically speed walking the whole time. I wear a fit bit and easily surpass 15,000 steps per day of work. The last, I repeat LAST thing on my mind on my days off is hitting the gym for a jog or weights. Please don't make me :'(