SAD Disorder

So, maybe it isn't exactly just my hormones. It has been almost 2 weeks since my last you know what and I am still down in the dumps. I just cannot get the clouds to lift. I am so tired all the time. I have lost my interest in working out, in cooking, in doing anything. I am angry with my kids - yelling at them all the time. I am crying more, but not all day long. I just feel like heavy overwhelming tired feeling that I cannot explain. Even my eyes feel exausted - as if they look like they have big black circles around them, when they do not. My legs feel heavy when I try to run and I just cannot do it. Well...today I took my daughter to her counseling appointment and I ended up being the one getting the counseling. I went in with the counselor and just let it all out. I told her how I felt like I had all the symptoms of depression again and I feel so guilty. I feel like a lazy bum and a horrible abusive mother. She agreed with me about being depressed and that it may be S.A.D or Seasonal Affective Disorder. I have always had a hard time every year when it gets cold, but this time I thought I was golden because I am already taking Wellbutrin, or the generic crap they give you. I have been taking it for about 3 years and have done pretty well with only a few downs along the way. I just do not understand how this could happen to me if I am taking an antidepressant. I know I should probably change my medication, but I have tried so many other meds and they have caused many other issues. For instance, I took Effexor for a few years and I became silently bulemic. The medicine made me so hungry I binge ate daily and well you know the rest. I am ashamed, but as soon as I stopped the medication, I stopped binging and purging. The other problem drug, Cymbalta, well this one made me a raging party animal/alcholic who did not want to be at home with her kids, and I was still flipping sad. I cried at night which was why I was getting wasted.