Am I correct you are at school (college or university)?

Go see a guidance counselor.They would be excellent to talk to and can forward you along to additional resources or appointments with professionals if required.

I see you are in Canada. You are fortunate. While sadly the waiting lists for psychological and psychiatric help are lengthy, gladly it is free and pretty comprehensive. That guidance counselor can provide you help in the interim while you wait for a referral (and that's only if they or your family doctor think it's necessary). Yes, see your family doctor. If you don't have one, the guidance counselor can help with that too.

My point is that if you sense you are struggling now - and it is okay to say "I need help" - then ask for that help as soon as you can.