Hi @Carri77,
Welcome to the Forums!
It is fantastic that you are reaching out here to find out more about other people's experiences with psychosis, concentration and disorganised speech. Ultimately, one of the major benefits of the Forums is relating to other people who share similar experiences to you - you are definitely in the right place for this!
As @Bunniekins and @Queenie said, disorganised speech can be a symptom that people experiencing psychosis go through. In this light, it is understandable that speech and conversing can be anxiety-provoking - it is undoubtedly difficult and frustrating when you have something to say, but are struggling to get the words out the way you want! As @Bunniekins and @Queenie said, medications may help with such experiences, but please consult your psychiatrist or GP around this.
Again, as @Bunniekins and @Queenie said, being open with your psychologist about disorganised speech, concentration issues or even depression are very unlikely to result in hospitalisation. Hospitalisation is often resorted to when there is a fear that you may harm yourself or another. Hopefully, this eases some of the anxiety you are experiencing around being hospitalised. On the flip side, sharing the struggles you are going through with your speech, concentration and low mood may allow the psychologist to have a better understanding of what work needs to be done in order to best help you.
I hope the responses you've gotten so far have been helpful for you. We have a really supportive community here on the Forums, so please feel free to continue to reach out for support and suggestions as needed. 
Kindest,
Amour_Et_Psyché