Girls, hair is falling out really badly... I can see that the hair is …

Girls, hair is falling out really badly... I can see that the hair is getting thinner. Has anyone taken solarium tanning on their skin while breastfeeding? It's written that it's not allowed. But on the lactation certificate it's also written that it's not allowed for pregnant and breastfeeding women, although they still prescribe it. How should I be? Or does anyone know any ways to stop this nightmare with hair loss?