How likely is it to be misdiagnosed for PDD-NOS?

I've been feeling pretty confused and depressed lately because of my diagnosis. I may be in denial or something but I was diagnosed with PDD-NOS which when I was younger and now I'm feeling depressed about it and I'm not sure if I fit in with the description. I think it might of been a misdiagnosis and I'm not sure if that is likely the case. The thing is, after reading about it I don't feel like I belong with in the Autism Spectrum. It may be my head and OCD playing tricks on me though. I just seem to be different from what the condition is described as but I don't know. I'm not sure if I should get re diagnosed or not. Can it get mistaken for an Anxiety disorder? I seem to feel very anxious and I am good at Language Arts and Reading but I do poorly at Math but I know that doesn't automatically mean I can't be in the Autistic Spectrum at all. I understand people's emotions and feelings perfectly and I can show empathy to anyone. I also have no trouble having a conversation with people and I feel pretty confident with it. However, I am extremely shy and I think I may just have Social Anxiety because I get nervous when approaching people. I can communicate with people but I am just very shy it seems like. I do have special interests and obsessions about things, if anything relates me to it, but, I don't go talking about it with others when I'm in a conversation and I can have small talk and I am fine with whatever conversation is placed and it doesn't have to be about my obsessions which I have. I think my special interest and obsessions may have to do with the OCPD I face as well. Overall, I just feel like I have more anxiety in these situations and I am more stressed. When I was younger, I had Selective Mutism for years and I'm not sure if that has to do with PDD-NOS but I think it may have to do more of fear and Social Anxiety. I just feel like I have more Anxiety overall and I fit with that more rather than the Autism spectrum. Is it likely for PDD-NOS to get misdiagnosed and should I get re-evaluated?

Hi, I have no idea if it's easy to get misdiagnosed with PDD-NOS. I do know, however, that autistic spectrum is very broad - you can find both very talkative people there, people who don't talk at all, mathematicians and people with dyscalculia etc. Social anxiety and selective mutism are comorbid with autistic spectrum, as far as I remember.
Do you have any therapist? If it bothers you maybe you can talk with a professional to see if they think it would be wise to rediagnose you?