Hello- I am sorry to hear about the loss of your mother. Grief is a process that is something that you have to embrace and understand as a normal part of living. If you avoid this process, you can become depressed and have other complication. You need to understand that it is ok that express your emotions about the loss, it is important to have others who understand and can be supportive when you want to talk about the loss. Many find comfort in finding others that have experienced similar losses and have gone through the process of grieving. This can be accomplished through social, familial or religious contacts. Many find comfort in attending support groups for people who have experienced the death of a loved one.
Continue to take walks as it will help you in the grieving process and is also great for your physical and mental well being.
The following link: http://www.griefshare.org/ has an abundance of information related to the process of grieving and also has a list of support groups. There are also online support groups that may be helpful.
Realize that this is going to take time and allow the grief for the loss to flow out. It is normal and healthy and the process we all face at some point in life.
I wish you comfort and peace.