97 Ford Mustang

sounds like the clutch isn't dis engaging for what ever reason and you'r pounding it into gear , the tranny is probably destroyed or close to it at this point

Im not hard on the car. I just bought it a month ago.

if you're cramming it into gear you're going to ruin the tranny .

Oh ok. Ive been double shifting it and then it goes into gear

it's a hydraulic clutch try bleeding it out , there's only a handful of people that even know what double clutching actually is

It's not a hydraulic clutch , It's operated by a cable / it's what they call a pull clutch !!! it sound to me as if the pilot bearing is bad and /or the input shaft is worn , Sad to say the only way to confirm this is to remove the tranny , so you may as well buy the complete clutch kit plus replace the clutch cable

Have you checked trans. oil level