M.C.
There are two types of "pinhole" locks... The kind you push, and the kind you turn to unlock. (At least in my experience...)
If using a paper clip didn't work, try finding something sturdy with a flat tip. You might try going to a home improvement store and see if they have one of the unlocker-thingies. (Lol.) they look like a flat rod, with a loop on one end and the other end is flat like a screwdriver. I imagine it would be cheaper an a locksmith!
If the hinges are on your side, take the darn door off! Lol.