YES! Absolutely you should tell your doctor. He or she may not know exactly how to deal with your situation, but the doctor can help direct you to professionals who can help you find resources to help you sort out your situation and what's best for you.

There are actually medical and genetic tests now that can be used to help determine if there are physical reasons for your situation.

You don't state your age in your profile, but depending on your age, you could be experiencing a number of emotional issues that come with confronting your transgender identity.
Some transgenders experience a range of secondary issues ranging from acute depression, even becoming suicidal. Others become dare-devils, engaging in high risk behaviors.
Some turn to drugs, alcohol, and promiscuous sex, or even prostitution. Many have trouble adjusting to living two lives, and have trouble being situation appropriate.

For many of us, coming out comes with a flood of regrets, wishing we had done more sooner, angry at ourselves and others for living in secret for so long.

I remember telling several doctors in the 1960s and 1970s, including a psychologist, therapists, and medical doctors, and they just blew me off. They had no clue how to treat the condition, or how dangerous the condition could potentially be if left completely untreated.

Today, the medical profession is far better trained, and transgender issues have been a key focus of the recent APA conventions for psychologists and psychiatrists.