I am having this problem of producing three in a Canadian way

When I was in class, I said three and people will say "what?"

Then I say again "THREE"

*shaking my tounge when I was saying the word*

Again, "what?"

I swear at that moment I would like to shout out "p"

But I didnt for sure, I was in a class anyway.

I realize that this is my own problem when I went to an aquarium shop

I said:

"I am sorry but I want to get three fishes"

"There are two in there."

"No, I mean three"

"There are already two inside!"

So I take off my shoes and show him how to count finger.

My left hand middle finger, right hand middle finger, and my left leg middle finger

He understood me immediately. I am so proud