Mood and pump output

So essentially I got some really bad advice that has resulted in my previously really good supply tanking and my poor babe having slow weight gain. Fortunately I think his weight his improving but I am burning through my freezer stash as I try to pump to re-establish supply. It’s so clear to me that my output is way less when I’m stressed but now I’ve caught myself in this vicious cycle of stressing about running out of supply every time I pump and getting less and less. Has anyone actually successfully improved supply that had significantly decreased and how long did it realistically take? I’m prepared to top up with formula if necessary but I really don’t want to.