Minor Caught Shoplifting in California, Age 17

My question involves criminal law for the state of: California.
I went into sephora today and stole some makeup. Money is tight in our house and my mom is a single mom. I'm not trying to make up excuses but just giving background. I went to put additional makeup in my bag, and just before I would have, a lady working there saw but I acted like I had a question to ask. She answered my question and then gave me a basket to put my makeup in. She then went and told a group of coworkers something, and one lady looked at me. While I continued looking around, the lady who answered my questions said into her mic "yeah I called security" and while I was walking around I was asked if I needed help at least 5 times. I knew I had to buy something, so I put the expensive stuff away and bought something cheap with cash but with my rewards card also, so they have my info (I don't know what I was thinking). I left the store sick to my stomach, but when I got home I realized I had makeup that I stole from before the incident. I may or may not be on camera for those. I feel really bad and my question is, can they prosecute me if I have left the store? Should I go back and tell them the truth and give back everything I stole? If they do end up prosecuting me, what are my consequences? I am applying to college. Will this show up on my record? Any help would be appreciated. Pleasee!

can they prosecute me if I have left the store? Yes.

If they do end up prosecuting me, what are my consequences? Depends on exactly what you end up being charged with.

I am applying to college. Will this show up on my record? Possibly. Again, it depends on exactly what you are charged with and what consequences you end up with.

Rewards card...um...that has your name and address on it...Heck yes, they can charge you.

Consequences....a misdemeanor charge that will haunt you. If you are charged - any college financial aid or scholarships are can be history. Court costs and fines. And a Civil Demand from the store....Lawyer or Public Defender...

In all....let's say you stole $10 of makeup....it can cost you $1000+.