There are so many things - physical and emotional - that can present as depression and other disorders. I hope you keep the appointment with your doctor and he/she asks a lot of questions to open up the many possibilities. It could be thyroid, hormone or some other physical issue that can be helped with the right prescription/therapy.

As a doctor once asked me - when you hear hoof beats outside - is it a horse or a zebra?

Start by assuming the most reasonable answer.

Wishing you the best!