Question about logging in my MacBook pro (2017)

Hi. I am not able to login my MacBook for two days. I tried to login (with my correct password) as usual but it just displaied " your computer restarted because of a problem". It showed up everytime i entered my password. Then i followed the direction shown on screen ( about having troubles on loggin). I typed my apple id and password (which is correct) and it ended up with a statement "there was an error connecting to the apple server". Can someone help me with this issue please? Thank you.