Dear An: Thank you for waiting for two days to get a reply. Given the severity of your symptoms, 48 hours would be a long time to wait.
The easiest question first, OK? In my clinical experience, some women definitely seem to have worsened depression and anxiety when taking birth control pills (BCPs). There is not a particular brand of BCP which seems to make all the problems. Sometimes a switch of brand can make an improvement (you mentioned needing to switch off the Yaz brand of BCP). Some women will do better switching to a nonhormonal method of contraception. In my experience, women with a personal, or family, history of depression/anxiety are more likely to have an increased risk for down moods on BCPs--or other hormonal kinds of birth control.
As you may have read, both depression and anxiety (frequently co-exisiting in women) are important women's health concerns. Women have twice the incidence of these mood symptoms than men. One in every four or five women will have a major depression at some time in her life. There also seem to be times of hormonal flux when down moods are more prevalent (eg premenstrual, postpartum, perimenopause).
The most important thing is for you to get help
right away. You can start with the GYN or clinic that prescribed your BCPs. They may have you use another kind of birth control. They may refer you to a counselor or even a person with specialized expertise in women's mood disorders (could be therapist, psych nurse practitioner, or psychiatrist). Your GYN should also be able to evaluate you for other medical conditions which can cause depression/anxiety (eg thryoid disorders, mitral valve prolapse of the heart, metabolic problems, etc.). If you progress to suicidal thoughts, that mandates an ER visit.
Lastly, do not hesitate to ask for help from a close friend or other trusted person. Once you begin talking with other women you may realize that depression has touched MANY of us.
Been There,
Jane