help with my hair!

Hello! It's been 4 months and a half since my son was born and as you all know the first few months you even forget your hair exists, I've basically kept mine in a bun for the last 4 months. After 1 month or so I experienced some hair loss but that was it and now suddenly like 3 weeks ago my hair started falling in clumps when showering, when brushing it even by just touching it!!!! I'm so worried because it's starting to show. Can you give any tips to go back to normal? My hair used to be so thick and shiny and now it's just a rat nest that keeps falling 😭