I need to take a test so how do I do this without exchanging my license?
No chance, sunshine. You want to add categories, you need a Polish licence.
By the way, can somebody confirm that even with another EU licence you get points deducted?
Yeah, it's how it works. It's why you have to go to the police station to find out your driving record - it's all through the PESEL.
Of course, if you're stopped for something mundane, like speeding - don't volunteer any information about your PESEL at all and act stupid about it. The beauty of being a foreigner is that you can play dumb and get away with it - after all, they can only add points to a PESEL that they know about.
Quite clever really, especially considering the way that the UK can't add points to foreign licenses!