Macbook Pro restarts or freezes when pressure is put on hard drive location

(Mid-2012, 13")

I've posted about this before, but have since looked up the locations of hardware in the Macbook and know what it is that's restarting it.

When I say 'pressure is put on hard drive', I don't mean intentionally putting a large weight on it. I can rest my palm on the left corner, and it's fine, but picking the laptop up with one hand in that location to shift it over, or accidentally resting my elbow on it, it then restarts or freezes. It's never done so in the past, so I'm worried the hard drive might not be doing too well.

I'm not too savvy with computer hard ware, so am reaching out and wanting to find out what sort of repairs/maintenance I'm looking at.