something you may not be aware of... in 2013 america changed over to a new standard for mental disorders... one of the changes is that depressive disorders now include the symptoms you posted about. (which may be why your treatment providers said you have bipolar disorder and have not diagnosed you with a dissociative disorder)

my suggestion is talk with your treatment providers. they can explain to you about the new diagnostics and symptoms and why they say your problems are bipolar disorder.

another thing I can tell you is that I have bipolar disorder and do have the symptoms that you have posted about. short version psychotropic medications that treat bipolar have the unfortunate side effect of sometimes causing a person to have lack of affect... this is where because of medications sometimes I end up not being able to show, express and feel emotions. just kind of sit there watching and sometimes feeling like I have split in half similar to having alternate personalities but a bit different. when this happens to me I get physical. I stand up, walk around, take my canoe out on the lake and get in touch with nature... and other grounding myself back in touch with my body and others around me.

maybe you and your treatment providers can take the time to write out some grounding activities for you to do that will help you to reconnect with your self and your surroundings.