so much acne it's depressing me ☹

how did you guys change your diet to improve acne? mine is so bad. im 16 weeks pregnant but that has nothing to do with it I had acne before to and the only thing to ever get rid of it was the dermatologist but had to stop using that obviously and would love if I could figure out some other way to stop the acne without putting those chemicals in my skin never liked doing it but it was the only thing that cleared me up. Im currently not washing my face with anything and it's pretty bad very red and a lot of hyperpigmentation, in fact it's mostly hyperpigmentation still defly a lot of pimples tho ☹☹☹