There are some differences in the kind of mental health providers available in the United States that would be helpful for you to know as you begin to look for your own therapist. Psychiatrists are physicians with specialized training in mental health. These residencies are always based in hospitals, so psychiatrists are most thoroughly trained in the most severe mental health problems, but usually there are affiliated clinics where they get experience working with people who have less acute and severe problems during the last year of their training. Sometimes psychiatrists will take further training after residency in specialty areas like geriatrics or psychoanalysis. These training programs have unique requirements and you should ask if you want to know about them.
Psychologists have training specifically in human behavior.
Usually a one year internship follows or may be integrated into the program. While all licensed psychologists will have the same core areas of training, there is some variation in the amount of time spent in training on the specific skills used in the evaluation and treatment of mental health problems. Psychologists trained in clinical psychology are the most directly trained to work with mental health problems, but those with other training are also qualified, often by virtue of clinical internships, by specialty post-doctoral training or by years of supervised experience. A few states still license psychologists with only masters degrees, but in most states a licensed psychologist must have a doctoral degree. It is important that you ask about these issues if they make a difference for you.