Need help destashing

I had quite an over supply at the beginning of our breastfeeding journey and between ties and multiple bouts of mastitis finally have managed to feel successful. My little had trouble with gaining in the beginning but is having no problems now. I have 500ish oz in my deep freezer that I can’t seem to part with. I know how to go about donating but every time I try I am overcome with anxiety that my supply will dry up and I will no longer be able to provide for my child. He is 12 weeks and I have only donated about 50 oz. It has been weighing on my heart and I feel that I could be helping a momma in need but always hit this emotional block.

Can anyone offer advice?