Shaking when accelerating and or not accelerating properly, airflow Issues?

A while back the car was shaking when accelerating and or not accelerating properly. And sometimes the engine would stutter when first applying the gas pedal. I ordered a Mass airflow sensor online but when I replaced it the problem seemed to be worse. So, I cleaned the old one and put it back in. It ran ok for a while. The check engine light even turned off for a couple of days. The stuttering never stopped though. Now it’s not wanting to accelerate again and blows hot air out of the A/C vents.