Hi guys, I was on the same boat, worked for about 2 weeks between finishing school & applying PGWP. I was really nervous when I was preparing documents too. I recently got my COPR and hope my experience can help.
First and the most important info is: it's not uncommon for international student to make this mistake. If you search in this forum, you will find plenty people in similar situation. So you are not alone, don't panic.
And the second most important info is: because it's theoretically "unauthorized", the work experience before applying for PGWP doesn't count towards the 12-month work experience. For the purpose of ITA, start counting from the day you submit PGWP application/flagpoled.
Based on what I saw in this forum, people have dealt with it in a wide range of ways. Some didn't even realized it and just submitted their application. Some were completely honest and wrote an LOE explaining the situation, that it was truly unintentional and hope the officers will understand. I've seen successes in different strategies. So you can decide on a strategy that will work best for you. (
https://www.canadavisa.com/canada-immigration-discussion-board/threads/unauthorized-work-before-pgwp-will-it-affect-pr-application-under-cec.657266/#post-8957070)
The following is my situation & just wanna share it as ONE of the cases.
Right after graduation, I worked as a summer student in the college until I found an "actual" job a month later. So when creating EE profile, I didn't include that month in college as work experience. It was right before submitting the documents when I realized the unauthorized work. After a lot of thought, my strategy was:
After ITA, the portal gives you two places to fill the experiences, they are:
Work experience--- things listed here count towards the CRS scores, and you will need to provide supporting documents to prove them.
Personal experience--- all the schooling, gaps, employment and everything. The system won't ask you for supporting documents for anything listed here.
I listed the 1-month of work under "Personal experience", but not under "Work experience". My thought was, in this case, I'm not intentionally hiding it, and at the same time don't have to reveal every detail unless asked to later. They didn't ask me for any additional information & I'm lucky things went smoothly