How long have you been at your job? Did you get adequate training? Maybe you could ask for some more help and tell them you are serious about the job but you are having a hard time? I know how scary it is to be between jobs and stressing money. Maybe you can consider options in the event your are let go. I know having to take a step back because something like this is hard but it happens to all of us at some point. Just try to be as prepared as possible and reach out if you need help.