UGH it is so frustrating, I know. When I first joined here I posted about how I apparently couldn't lose any weight and I got all kinds of advice. Although SBD is my base plan, I incorporated several things, and I am constantly a "work in progress." I do things such as have an "eating window," in other words not letting myself graze all day long until bedtime (mine is 8 hours, so it's not that restrictive) ... I also HAVE to go lower carb to lose any weight ... and have to get lots of incidental exercise in my day, mostly meaning walking walking and more walking (which I am NOT doing currently).
I (and others) suggested a list of things to try when you posted about "ready to give up". The only thing I can think to add, or emphasize, is to ensure that you are getting enough veggies in. I really have to plan my veggies first, then add some protein, to be successful.
I hope you sort it out! Everyone has to find out what works with their bodies at whatever stage of life they are in. Personally I don't think I can ever go back to eating grains daily - that was a HUGE adjustment but I'm OK with that now since I found enough other things I love.
PS YES stress can definitely wreak havoc on a body's ability to shed weight. Stress management techniques are something to consider. Maybe walking while focusing on breath control? Then you are getting more activity as well!