Hair falling/breastfeeding

Hi !- so I’ve been exclusively breastfeeding for the past 4+mo and my hair’s falling out has gotten much worse in the past month where I cut it to neck level and is still bad. I asked the pediatrician she said there’s no connection to breastfeeding check your thyroid. I had my annual check-up and all levels were ok my cholesterol 223, but doc says it’s ok bc I’m breastfeeding.. Idk what’s happening I’m getting worried have been getting nail/hair vitamins on top of prenatal supplements

and calcium…ty!!