This isn’t sustainable.
Your husband can and should help. You need to get back to bed, not on the sofa.
Honestly the more bottles you give, the harder baby will adapt to just breastfeeding. I know you don’t like the sound of it, but it’s true.
Offer baby boob, every 2 hrs min daytime (6am-10pm). Sit in bed comfy to do this, top off and cover you both with a light blanket so baby has full skin to skin and your both warm.
At 7 months, a breastfeed now takes 2-10 mins long on average. At 2 weeks it’s more like 20-30 min feeds as they suck so slowly. It’s how they practice and their jaw muscles are so small at 2 weeks.
At night, get dh to pass baby from basket/ crib so you can get yourself into a comfy position first and sit in bed to feed. After baby is fed, if they don’t go straight back to sleep, Dh needs to take over cuddling, rocking or changing baby. That way, you should get a bit of time in between to rest.
Daytime, your dh needs to do all changes, bathing, rocking to sleep so you get to rest
If you choose to continue to express to top up, you need to express at set times, after baby has already fed. I wouldn’t express overnight. After first morning feed, and after mid morning best