Hi, I'd like to help you with your question.
I am sorry about the loss of your mother.
It is easy to feel that emotions are hard to handle right now. You have been through a significant loss. Losing a parents is a major milestone in a person's life and you may feel the loss very deeply. Any type of emotion or reaction from other's can feel like salt in a wound.
It would be nice for your employer to give you more time off. But most employers are going to see your loss as an employee who needed time off, and not much more. Very few employers are able to balance sympathy for an employee with productivity in a business. But most are not able to do that, so they take the safe road of treating everything and everyone from a business perspective.
When your co-workers approach you with sympathies about your mother, they are interested in your welfare and most of them feel helpless about what they can say or do to make you feel better. Accept their comments and offer a smile and a thank you. That is all you are obligated to do.
What is most important right now is how you are feeling about the loss of your mother and how you can take care of yourself. What helps you feel better? Remembering your mother in a special way, talking to others, going out somewhere special, or being alone with a cup of tea and a book. All of these are examples of things you can do to help yourself.
It is important that you allow yourself time to grieve. Often, people will feel obligated to keep up the routine of life and pretend everything is alright. However, you need to allow for time to mourn and allow for the expression of your feelings. As long as it's safe and legal, it's ok to do.
Do you have any supports right now? Good friends and family can help a lot. There are also support groups that can help ease your pain by showing you that you are not alone. Here is a link to find a group:
You can also educate yourself about grief and how to work your way through it. Here are some resources to help you get started:
Healing After Loss: Daily Meditations For Working Through Grief by Martha Whitmore Hickman
On Grief and Grieving: Finding the Meaning of Grief Through the Five Stages of Loss by Elisabeth Kubler-Ross and David Kessler
When there Are No Words: Finding Your Way to Cope with Loss and Grief by Charlie Walton
You can find these books on Amazon.com or your local library may have them for you.
I hope this has helped you,