First time trying to find a bra that fits post-breastfeeding. And I’m struggling.

My measurements are (all in inches), US sizing.

Loose underbust: 34.5

Snug underbust: 33.5

Tight underbust: 32

Standing bust: 41.5

Leaning bust: 44.5

Lying bust: 41.5

It said that I should be a 34 H/I, but to ask here because US sizing is inconsistent above a DD

After breast-feeding two children, my breast tissue is extremely soft, and hanging low. I’ve looked at the info here about the shape of breast but that just got me even more confused. I’m very flat on top and larger on the bottom since they hang down so much. I’m still wearing my old nursing bras which are far too big with no support. Everything is just “size large”. The bands are either too loose or way too tight. And even if one fits well when I try it on, within 5 mins of wearing it they’re trying to pooch out the neck hole (if that makes sense?). Also want to note that I carry a lot to weight in my stomach so the bands always roll up.

Of course no where in my city will sell something of this size. When I go to Amazon to try and find something, I look at their sizing and guides and it’s telling me if I’m a 34 under bust then I need to order like a size 38?? I’m so confused. I really can’t spend a lot of money so I was hoping for a cheap Amazon bra but I’m at a loss of what to order.

If you need more info from me, feel free to ask.