Volvo’s tone could use improvement, but he does make a good point. It’s not that you shouldn’t pop on here and ask, but when you actually take it to the shop, you should limit your discussion to only what symptoms you observed. Then after the mechanic tells you what he thinks the problem is, you can compare it to what you’ve seen here and see if it makes sense. If he tells you the symptoms are because the rear brake caliper is seized, you know he’s off base. 
A lot of people will ask what a forum thinks the problem is, and then go tell the mechanic “Replace part X.” And the mechanic will, and that wasn’t the problem, and now they’re out money because they did not tell the mechanic to diagnose the problem - they just told him to replace a part, which he did.