Well, to be honest, if what you need is to lose weight, DIET comes first, workout comes last.

I lost most the weight in the 9 months before I even started working out.
I agree with the comment that if you're tired, then you need to listen to your body. HOWEVER, exercise gives you extra energy. Make some trials and find what works for you. Listening to your body is an ongoing learning process!

I'm wondering if a change in your way of eating will also help to feel less tired or help ameliorate your condition? I'm no expert so don't listen too much to me, I'm just thinking out loud.

Good luck!

Sleep is more important than anything else, if your body is telling you that you need it, you need it!

One thing that may make a difference is taking walks on breaks. If you don't take breaks, start taking them. They are yours by law, and it will help you physically and mentally to get away for 10-15 minutes a couple of times a day.

Can your husband take care of the morning chores 2x per week and you get in a workout before work? That is when you will have the most energy, and it may help you all day long.