Can I get revoked if I have a credit card and a loan... that I took out. I didn't realize that it was a violation at the time, but I haven't missed a payment on either one and I don't want to tell her now after I already got them..

Under some probation rules you cannot incur new debt. Talk this over with your probation officer. So long as you are current on any fines or fees that you had imposed on you, I'm not sure this would violate your probation or not. If it was for a substantial loan, then I'm not even going to guess one way or another.

If it is against the rules of probation, yes they can, best be honest with the PO