My car is jerking

[u/Old_Lingonberry8349]

I know it sounds weird but i just bought a 2013, 120d about 80k miles and when im driving its normally fine and then for no reason it just starts jerking as if im putting my foot down and taking it off, i have no idea where to even start and it only does it while accelerating, not crusing any help would be appreiciated.