MaximusRojas

So i just got my 2000 maxima and it was running alright yesterday and this moring i was driving around and suddenly the car rpms slowly rose but didnt shift n felt as if i was stuck in a lower gear, mind u i was goin 30. I let go the gas and when i stepped on it again if was as if i had shifted into neutral, i left it in neutral n cruised then stopped and put it in "D" and it drove normal then as i got to my block it felt as if i had put it in NUETRAL then back in gear.
Im wondering if its the tranny giving out or any possibilities