Every matter has a unique set of facts that make every resolution different. Your attorney may try and negotiate a mutually agreeable resolution before the need for any formal hearing.
Potential penalties can include agreeing to attend a remedial program, such as an ethics course or professionalism course, censure which is a nonpublic official record of disapproval, reprimand which is a public letter of formal discipline, fines (up to $10,000 for each violation), probation, agreeing to attend substance abuse treatment, and in the most serious cases, suspension or revocation of your license.