Needing some motivation!!

im sure it's normal, but I'm 1 month into this journey and last night it all felt so daunting and my goals felt unreachable. I know I can do this but there's this little voice in the back of my head telling me that my body just won't cooperate. I really have no reason for feeling this way, I have had success every week so far, 11.2lbs down in 4 weeks. Starring at the next 60lbs in the mirror makes me nervous and wonder how I got here? and how am I going to get out of here? I stress about a plateau and how I will overcome it... Am I just getting ahead of myself? or is it good to plan for your worst days as much as your good?