Ue Reality CR-x 3D printer changed nozzle problem

Hi, I bought a Creality CR-X 3D printer in january 2019. After doing all the work testing and printing final when i got some experience of mistake, My Nozzle got clogged and finally had to replace it. After replacing i noticed that the nozzle was 3 mm longer, so the i did started the printer it was to close to the plate and was forcing. Tried everything to have this to work but could not put this to work. did anyone have same experience and how to fix this, Regards