I feel like im not doing well at work

Hello all, I get the feeling that I'm not doing well at work. I get my work done and am probably doing just as well as my company workers. I just get this off nagging feeling that I'm going to get in trouble for doing something wrong or bad. I have not been reprimanded for anything. Idk is this normal? I feel like I cannot explain myself when talking to my boss. He seems supportive but like he doesn't know what I am saying. Not sure if this is venting or if anyone else goes through this.