The nature of headache you describe is not uncommon, as part of depresion or migrane. The inability to concentrate is aslo quite common as part of depression. If you ahve taken treatemnt earlier for depression, it will be best to continue with the same psychiatrist. Although there is some genetic basis for depression, it is not necesary to be worried about the possible impact of your depression on your future children. In any case, your psychiatrist will be best placed to clarify your doubts on this and other issues.