There is no way to say this is a personality disorder.
If it were, you would not be concerned at all.
This sounds more like a mood problem, or even a physical problem [hormonal].
Finding an answer starts with medical evaluation from your doctor.
OK, so you might have more questions or want to give me more information: Please use reply to expert if you have further questions. When you are ready, please click a positive rating [hopefully excellent—that’s how we are paid, per rating]. If you forgot something, come back. I am here