Why am I only get acne on one side of my face?

Hi! I'm a 23 yr old currently suffering from adult acne.

I've noticed that for about a month and a half now, I have been getting quite a bit of acne on the right side of my face. They're usually small and spaced out from my side burn area to my chin/jaw. Here are a couple things I've heard that might be the reason but I don't think they resonate with me.

1) It might be due to too much sugar intake. - I have drastically lowered my sugar intake from 1.5 months ago. Before I used to eat cookies and a ton of junk food. Now I have an occasional small cookie but, mostly, I get my sugar intake from fruits. So that doesn't seem to be the case

2) Dirty pillow case.-The right side of my face never touches the pill case since I sleep on my left side. Also, I wash my pillow case quite frequently so that isn't applicable to me neither.

3) Phone-I usually put my phone on speaker or use headphones to answer calls so that isn't the reason either.

4) Dirty Hair- I wash my hair every 2 days, before it starts getting grease/dirty. I also part my hair to the left so most of it isn't touching my right side. So, again, that's no the reason either.

I do touch my face here and there but I usually touch both sides, not just the right side. I put makeup on to hide the acne and the dark marks left behind by the acne. I don't drink a ton of coffee. Maybe 4 oz per day during the weekdays.

So...Why am I breaking out on one side of my face? How can I stop it? Any insight would be greatly appreciated!!