Terrible dandruff!!!

Please help, I just noticed tonight that I have terrible dandruff. Like just thick flakes of skin on my scalp 🤢 I’m assuming this must be a pregnancy thing cause I’ve never had it before. I have a detox shampoo and conditioner but idk if I should use it cause it is drying since it’s a detox so I rarely use it. What should I do?? Do I just start with head and shoulders shampoo or do I need to exfoliate my scalp first? It’s grossing me out so much right now