I struggle getting out of the house with my kids😭

I currently have a rambunctious 3 year old and my 5 month old Velcro baby. My husband works 5 days a week from 6 am-4pm so I'm on my own most of the day! I get very overwhelmed almost every day and every little task I have to do (like getting everyone dressed, the battle of brushing my toddlers teeth, make breakfast for me and my toddler) feels like a huge job. By the time I get everyone ready, all of my energy is used up and I don't even want to leave the house anymore. My anxiety takes over. We live on the 3rd floor of our apartment building and there's no elevator. I have to take 1 baby at a time up and down the stairs anytime we go somewhere. It's just so daunting!!! I feel like such a lazy mom and I know my toddler loves to be outside but for some reason that still doesn't motivate me to get out with them by myself. I'm always nervous my toddler will try to run away from me while in public while I'm nursing the baby or something. We usually end up just being couch potatoes and watching tv all day. What is wrong with me??