Prednisone stopped hair falling out - autoimmune?

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So I shed hair pretty badly, it’s also bulbed at the root. All over my body. My hair has thinned significantly. I was on prednisone for 5 days for laryngitis and during that time I noticed that I shed significantly less hair. Now bloodwork, Ana etc, was negative but if prednisone helped with this type of hair loss doesn’t that mean I have some sort of autoimmune condition?