Andrewzabomb

Car has 84,000 miles, got it from a dealer. It just started chugging while driving up hill or accelerating. I will be around 2000-3000 rpms and my foot will only be on the gas and the car acts almost like its going to stall out. It doesnt die when it happens and it doesnt happen everytime i accelerate or drive up a hill. Ive noticed it happen in every gear except 1st.

Please help
Thanks