Poverty of thought? Thought blocking?

Is this a symptom of a developmental disorder or ADHD? I am deprived of thoughts cant think well at all cant converse with people because my mind is numb yeah I am talking now but thats because it's about myself I cant think of anything to say to keep the conversation going I am blank like I have writers block 24 7 I also feel trapped in my head and unreal when I have to talk to people. I cant pass job interviews because my thoughts are blocked and when I try to think nothing comes into my head its like my thoughts are constantly being sucked out of my head by a vacuum. I dont suffer from hallucinations or delusions and I am 22 years old.