Post Covid hair fall and and still severe Hairfall - #10184

I started losing hair during covid and later on my brother also started to shed hair and after some time we could see our scalp the hair fall did not stop so we took blood test and their were some nutritional deficiencies like vit d iron b12 so we corrected them but the hair fall did not stop so later we had prp andI started using minoxidil and my hair were back but after using minoxidil for more than 1 year suddenly 2 months back my hair started to fall again. But doctors told me it should not have happened if you are using minoxidil reg