Helmet head help!!!!

Hello there fellow growbie. So if I understand correctly, you tried to remove the shell and then after removing it you noticed that the plant hasn’t developed as far as you would have liked? Not much you really can do at this stage to be honest. A few things to reduce stress would be advised, so make sure humidity is high for the young seedling and that it doesn’t get any light burn or temp stress or anything like that. If she is too damaged to recover she will die, if not she should bounce back relatively soon. Hope this helps and have a great day my dude