Wendy, I'm so sorry for the loss of your son. Going back to work is such a difficult, individual decision. You need to do what you feel you CAN do.
It's 10 years for me now, and, when I look back, I see that both the job, and more importantly, the people you will be surrounded by will play a big role in how you are able to function as an employee.
Are your bosses and co-workers supportive? Will they help you, or make you feel worse? Are you someone who is able to immerse yourself in work?
These sound like tough questions, but, believe me, they do come into play in your decision. In addition, the job you return to may not be the job for you any longer, and, you may decide to look for something different.
My experience was more negative than most. I worked for a screaming tyrant. who, the day after we buried our daughter, called and pressured me to return to my part-time job (SOMEONE has to do your job!), and kept pushing me until I collapsed in tears on my kitchen floor. I ended up taking 6 weeks, then returning for about a year. Co-workers were not only unsupportive, some were downright rude and hurtful. After I also lost my Mom, it became unbearable.
I moved on to a different full-time job, but found I could not handle it. By some twist of fate, another grieving mother whom I had met at a Compassionate Friends meeting also worked there. I was only a couple of weeks into it when my boss, and the other person's supervisor had a discussion (with me working in the same room) about how a year had been long enough for her to have gotten over it, and they were "sick" of her using it as an excuse to get out of work. They insisted she would have to stop scheduling counseling sessions during the work day. That, combined with other on the job issues told me to move on.
I floundered for 6 months, then found a job that I loved. The people were supportive, I liked the work, and I immersed myself in it. Then I became a workaholic. After 9/11, I started to feel again, and questioned what I was doing, and why. A few months later, I hit the wall and came home. Although I've had a few short-term jobs since, I found that it is harder to go out there. People want to know what you have been doing, and, they put a low premium at staying at home when you have no young children to care for.
I didn't mean to give you my whole story. I just wanted you to know that it is not a decision that you make and have to stick to, just because others think you should. Do what you feel you need to do, and eventually, you will find your way to what you want.
Hugs,
Dee