Hi, I'd like to help you with your question.
Tactile and visual hallucinations are not symptoms of Dissociation disorder. They are usually associated with a psychotic break, schizophrenia or similar types of disorders. It would depend on the duration, nature, and frequency of the hallucinations as to what it could be attributed to. In cases of severe child abuse, hallucinations can be seen as symptoms and usually are associated with PTSD.
It also depends on the type of Dissociation disorder you were diagnosed with. There are different types including identity, fugue, and amnesia. These all have different symptoms associated with them and include symptoms that come and go.
You may want to consider a second opinion if you are not comfortable with your diagnosis. Second opinions are common with medical diagnosis so it makes sense to have one with a mental health diagnosis, especially since you will be taking medications with many side effects. Here is a link to find another professional:
I hope this has helped,