My wife of 33 years passed away a year and a half ago. I still have times when the loss still is so painful. I got some help from classes at Hospice -- classes or groups made up of other widows and widowers. Hospice also offered me individual sessions with a therapist. Even though you husband may not have passed away under Hospice care, I believe Hospice can still offer you some kind of help. I also got help from antidepressants prescribed my doctor. Try to go out, spend time with friends or make new acquaintances. Especially helpful will be those who have also lost their spouses.Your loss is still so fresh. Gradually as time goes by, it will hurt less. Know that you are not alone in your pain.
Reach out for professional help as I have done and continue to do nearly two years after my beloved wife passed away. For several months, I saw a therapist at Hospice. I have met weekly for lunch with friends I met during support group meetings at Hospice. I also get help from a doctor along with antidepressants he prescribed. I made a special effort to make new friends through my church -- friends that I see almost daily. One of the best things I can do is see a friends(s) just about every day. Fortunately, I have adult children and grandchildren I have tried to develop a closer relationship with.
I have gotten more involved in my hobby -- photography -- that includes joining a photography club. If you have a hobby, I suggest you get more involved in it -- or try to develop a new hobby.
I have photos of my wife all around my house, and they make me happy because they help to make me feel closer to her. But if listening to the recording of your husband's voice over and over again make you feel more depressed -- then I suggest you discontinue listening to them.
These are my suggestions, coming from a person that is has no formal training in giving such help, only my own experience of struggling with my own loss. But perhaps the best help you will find is from those who have experienced and managed to survive a similar loss of a beloved spouse.
After only three weeks, your loss is still overwhelming, but your sadness, depression will get better with time, and some day you will actually find yourself smiling and even reaching out to help others who can benefit from your support.