Well, if the speed is correct:
it's more than likely coming from the cartridge"
how are your alignment skills/have needed tool set?
alignment: was it working well before? were/are the two screws tight (try moving the cartridge body by hand, twist sideways, move front to back, IOW, IF it was not tight, it could have moved.
arm height, parallel to lp when playing?
stylus worn/perhaps loose from cantilever or rarely chipped; cantilever flattened (low rider), or bent sideways; tracking force or anti-skate or both seriously off