How to part with stuff

I’m pretty sure I’m a hoarder, not like your TLC hoarder but I mean I struggle with getting rid of stuff, I have so much but I find sentimental value in a lot of it. At the money we are getting g ready to show our house so we can move into a bigger place. I’ve been getting major anxiety when my husband starts throwing away my stuff, to the point where I’ve had a few panic attacks. My mom keeps telling me to just let him get rid of stuff as it is just stuff and I have way too much but I honestly can’t shake the anxiety towards the what if’s, like what if he throws something away that I’m still using or still can be used, or if he tosses something that has memories attached to it and now they’ll be forever gone?

Please give me some advice on how to part with stuff without feeling so helpless and anxious