I would ask your therapist about full testing, to get a more complete picture. It's very easy to color your description of symptoms if you have a particular diagnosis in mind. While it is possible for a therapist to totally miss the mark, for various reasons, they typically are better at deciphering disorders. I would suggest asking your therapist to diagnose further and possibly do full testing, and compare their findings to your own research. Diagnosis are usually subject to change, especially in the beginning of seeing professionals as it takes time for them to know you personally.

I would also suggest checking out Katie Morton's Youtube channel. She explains every disorder in multiple videos and is very good. https://www.youtube.com/user/KatiMorton