day 27, and my body feels so weak

ive stopped smoking for 27 days. and my body feels so frail. i keep pulling muscles. banged my knee yesterday because i walked into a bench and it hurts like hell. i dont know, every little thing seems to effect me, its horrible. my muscles feel so weak.

ive been having such a low mood recently too. struggling to get out the house, and social anxiety is through the roof. can anyone relate to this