park works,reverse works fine ,neutral works,shifts into drive but won't go.....

What is your question?

I just drove the car almost 40 miles ...transmission acted fine ,then second day after sitting still...i go to shift into drive ,you could feel drive go into hear ,but rolls forward ,then almost to a stop on its on like it went into park.3rd doesn't feel a gear ,but will take off in 2nd gear...i just simply didn't try to drive it down the street ,to manually try and see if it would shift..i parked it instead...so I need to know ,what should I do ?