What do you mean by your head feels jammed?
Which anti-depressant are you taking?
For your constipation, have you tried a magnesium product called Natural Calm? You can find it & reviews on amazon, GNC, Vitamin Shop... It works great!
Could you please clarify what you mean when you say your head is jammed? Do you mean congested, or something else?
For the constipation and the weight, have you tried switching to a 100% whole-foods, plant-based, low-fat diet? You might want to check out Dr. John McDougall for more information on that. I think you would even find it helps with your depression issues as well. Good luck!