I’m a Mexican citizen, I went to Canada last year (April 2017) with a visitor visa, when my time was done I went to the US, I left canada for 3 days to get in again. When I arrived to the border I had no documents to prove that I was leaving soon so the officer told me “you can get in, but you have to leave before December 1st, otherwise you won’t be able to enter to canada again”, but at school they told me that since my eTA was valid and I was studying I could stay more. I left the country 18 days before (December 19th) and now I’m planning to go to MTL again to visit my boyfriend but I’m afraid that I might have some problems to get in. What should I do?