How to find out if your SAT score has been invalidated?

When I took the SAT, I went back on a previous section to bubble in an answer that wasn’t bubbled in correctly. My proctor didn’t tell me that she saw me bubbling on a previous section so I don’t know if I was caught or not. Yes I understand that what I did is not allowed and I understand the consequences of that. I do want to know will College Board inform you if your test has been invalidated or will you find out about it on the day the scores are released? Also, is the proctor required to tell you if you’ve been caught doing something you’re not supposed to do.
BTW, this was the first test that I took.

You would find out once scores are released.

S/he is supposed to tell you that s/he needs write up the incident. Since she didn’t, you’re probably OK…this time.