Don’t be too hard on yourself! While it could be due to your age, it’s only 1 month since you gave birth. I am younger than you but it took me around 3 months to regain my energy levels. You will still need to rest more, eat well. Since you have a helper, it’s good that you can leave the chores to her and focus on your recovery and baby. Hang in there!
Your body need time to adapt and get used to it. Pump in the day and dream feed nurisng is easier