I'm not saying the problems are the shoes, but it sounds very likely. If so, you shouldn't drive any further, because parts could get stuck inside and that would lead to a costly repair. Take a look in this post, I linked a thread from a german forum with some pictures...but keep in mind, that's the worst vase scenario!
https://www.volvoforums.org.uk/showp...55&postcount=9
Repair or check is relatively easy, you don't need a ramp or such a thing. You only need to lift the tyre up, remove it, remove the caliper and at last remove the brake disc. That's it. If repair is necessary, you better have some tools to make it easier, but they are not necessary, only comfortable.
EDIT: too late to the party
