How to avoid irration from shave !? (Down there 🐱)

Hey guys ! I (21F) have always shaved. I’ve tried different shavers including sensitive ones but I somehow ALWWAYS have itchy ingrowns within the next 2 days after. I can NEVER get a smooth shave without any razor bumps or just irritated bumps from shaving. I have used different shaving creams and also different shaving oils and nothing seems to really help… it’s especially embarrassing now since I have a boyfriend of 3 years and I want to have a nice clean shave without any embarrassment :/ I do have somewhat sensitive skin and that probably contributes, but I’m sure there is some way around it. If you guys have ANY tips or tricks pleaseeee fill me in ! <33