I would recommend going into sport places (probably more places like Primark etc. have larger sizes) and trying the gear on because I will not wear work out clothes that I don't feel right in and I have larger sizes just so i dont feel so exposed. I personally dont like cotton as much as the stretch stuff.
I got a great thick lycra set in Primark before christmas and got the jacket in a size 20 so it would fit like a normal jacket rather than a skin tight thing, I would go for plus sized for sure, be comfortable better going up a few sizes with tight clothes that you have to move so much in.
Bingeing is not coping
Kept up maintenance and learned more healthy habits