It sounds like you've had a lot of life change, that will have lasting effects going forward. I sympathize -- changes that leave us asking identity questions are usually pretty big, and it always takes me time to work through them.
I've seen a couple ways that plays out in wardrobe: sometimes we resolve some of the grief over the loss and the change of identity, and we make closet changes to reflect that—we've let go enough inside that we can let go of the externals.
At other times, we're not quite there yet inside, but we go ahead and change the externals anyway, as a conscious action that we're choosing to move forward into a new thing in our lives, and we're using this outward change to shake us loose and prompt more inward change.
I can see a purge for you coming from either of those places.
However, if you're still in a place of real grieving over the losses and the changes, and doing something with the clothing is only going to be more loss that you aren't ready for yet, then I'd recommend just packing it up whatever isn't getting worn right now and putting it into the self-storage unit until you're more ready to make decisions about it.
@Jessikams: my holding zone is a large shopping bag, not separated by different reasons. When I get ready to do a donation, I go through it and take out the stuff that I'm getting rid of for style/fit/annoyance reasons. Right now, I'm leaving the stuff that's in there for weight reasons. I've learned to trust that if I was annoyed or bored enough with something for it to go in the holding zone, it's rarely going to work to try to pull it back out. There is a reason it went in the bag.