Hi Fouad,
Are you still taking hormones? The possibility that your depression is linked to the hormone replacement should not be overlooked. I think you should talk to the doctor that prescribed the hormones and ask if this might be at the root of your depression. Depressions are not always psychological in nature and can be stimulated by medications.
Most thal patients do experience some type of psychiatric disorder during their lives, so it is not unusual. Anxiety and depression are two of the more common disorders that thals experience. In addition, you are at something of a crossroads in your life, having recently competed your studies. The uncertainty about your future is normal at your age and it may help if you try to draw on the confidence that has got you this far in life. Remind yourself that you have not always felt this way and that you won't always feel this way in the future.
Depression can affect anyone and can have many different causes, some psychological and some physical. For example, both myself and the other administrator of this group have to deal with Seasonal Affective Disorder (SAD) every winter. I combat it with vitamin D supplements and special lighting which mimics the sun, but it is still a battle for me every winter. This is primarily a physically caused depression, although I do feel that its existence does lead to the depression becoming stronger because of the psychological effects of the physically caused depression.
Try to keep busy and make sure you are getting plenty of vitamin D either directly from exposure to sunlight or through a supplement. D is needed for calcium to be properly absorbed, so all thals should make sure they have a steady source of vitamin D. One thing I have found is that volunteer work can make you feel much better about yourself and can help pull one out of depression.
Talk to your doctor about the use of hormones and find out if that may be a factor.