Mother stole my Xanax

I’m 17. Location: ON Canada.

I was prescribed a bottle of 30 alprazolam (Xanax) tablets to last me a few months.

I have never abused any drugs or alcohol. I have never taken my Xanax in a way my doctor did not approve. I have never had withdrawls or tolerance issues.

But my mom decided that I was misusing them (which is untrue), and is withholding them from me.

Can I report this to the pharmacist and get a second bottle?

What can I do?