--- Contraception drug is not Over The Counter in North America, so you need to go for your family physician for the prescription. Some of the doctors have some "free" contraception drugs which is still on the clinical trial(most of them are pretty safe), you could ask from them, but you need the be followed up by the doc.
-- The University of Ottawa clinic has some free contraception drugs too.
---As far as i know, the walking clinic will probably NOT give you contraception drug Rx due to the side affects.