Moms of Special Needs Kids

We all know that being a mom is a blessing, but at times, it is also very stressful. Lately, it's been quite a struggle for me. Don't get me wrong, I love my son with every fiber of my being, and would do anything to protect him and help him. But, there are times when I feel as if I have lost my own identity, and now, I am just mom. I feel like the zest for life that I once had has been zapped out of me and I don't know how to get it back. Have any of you mom's out there felt this way? If so, how did you get out of the funk? Any advice would be appreciated.