How far along does a pregnancy have to be before it causes pain if it is a tubular pregnancy?

I have a history of ovarian cysts (PCOS), but I also have the Mirena. I don't want to start freaking out, but I'm not sure how long to wait to see a doctor as I don't have health insurance. And NO- I haven't taken a pregnancy test yet, so don't ask!

It has to be at least 3 weeks to a month I believe.

It depends. But it is very severe and you can die, so its best to get things checked out asap.