If it was working before and now not you have to eliminate the obvious.
Is the Firmware the same? Did you accidentally reset the firmware to defaults changing the steps you thought you had set.
Is the software the same?
Is the filament old and full of moisture?
If none of these are the cause then start to look at the hotend that hit the bed.
Did you replace the nozzle? If not it could be damaged at the opening and giving you a weird result.
Is the Thermistor cracked and giving a false temp reading? Maybe running too hot.
Is the Heater loose giving inconsistent heating?