Your symptoms could be due to something as simple as a nutritional imbalance, vitamin deficiency, caffeine, alcohol, hormones, etc. She can help you determine if there is a physical cause for your symptoms or if you might need some additional treatment. There are also a number of easy self-assessment tools that you can use to determine if you should consider seeking professional help. I don't want to scare you, but I feel very strongly about this. My brother was never diagnosed with depression, but quietly withdrew from his family and friends and committed suicide last year.
Depression is serious but it is also very treatable.
Please talk to your doctor or a friend you can trust, and take care of yourself. Also, I have a question. I will work out religiously for a month or two.