Those are the classic symptoms of a B2B piston in your transmission that has broken.
Try doing a search under B2B and you should find several recent threads covering the subject.
Basically the B2B is a part that can be removed externally, it is under the largest round cover on the right side of the transmission.
Best to get the car off the road asap, and check to see if that has broke. It will continue to throw metal parts around in your trans from here on out.
Don't ask me how I know this.