Growing hair out

Aubrey ā€¢
I've been growing my hair out for years (getting trims every 2-3 months of course) and went to a new stylist... Apparently a "trim" means 4 inches.. What's the quickest way I can grow my hair out without taking biotin/ hair growth pills? They give me cystic acne šŸ˜ I already use little to no heat (twice a month at most) and wash every other day.