Shaving Down There

I haven’t shaved for the past four-ish years, and I’m tempted to shave again. The reason I stopped shaving was cause I constantly found myself squirming around from being itchy and not being able to itch myself in public lol. The itching would drive me crazy and would last for at least 3 days. I’ve been very comfortable with a bush, but lately I’ve noticed no matter how many times I shower a week a very smelly odor lingers from down there and I get embarrassed in public. I’m hoping to shave sometime this week, but I’d like to know if any of you have tips to prevent feeling itchy/irritation after shaving?