Hair.. someone please tell me

They’re in the same boat or that it’ll grow back 😭 sorry for the repetitive post but I feel like my hair loss is way worse than anyone else’s I’ve seen and I’m so distraught. I’m in my 20’s so I’m mortified. I’m taking biotin/ a collagen supplement.. I also do hair so I only use professional hair products. This is my first baby.. 4.5 months PP.