zero energy 😩

Im a stay at home FTM and my son just turned 2 months old. I've been wanting to start dieting/exercising but I have ZERO energy.
My son has silent reflux and still wakes up every 2-3 hours he also moves around a lot and will only sleep for a long time if he's on my chest. He hates being swaddled and doesn't like his carrier.  so I get little sleep and hardly any free time. When I do have free time I have zero energy and I just use the free time to eat, shower, sleep, or clean. I miss being able to get dolled up and being able to diet/exercise.
Whenever I can eat I always make unhealthy decisions because it's fast and easy and I usually have to eat it quickly. 
I'm eager to get my body back but it doesn't look like it's going to happen anytime soon.
😩😩😩