Hello, SavvySpirit!
Hopefully, as a professional speaking to an adult, your doctor will not be dismissive of you. If she does not feel capable of evaluating the reality of your condition, she should give you a referral to a therapist or a psychiatrist who can -- you can ask for that.
Perhaps you could review your posts here at PsychCentral and use them to summarize what you need to say:

• your "moodiness"
• a concrete description of your "moodiness"
• how long you have been experiencing unstable moods (including the fact you hid your condition for fear of an abusive father -- if you feel comfortable sharing that with your doctor)
• the whole range of physical symptoms (including tiredness/sluggishness) that accompany your moods
• the effect of your moods on your marriage and activities of daily living (ADLs)
• anything else you feel is relevant

It's great you are seeing a doctor! I wish you a good outcome!