All those years you worked you paid taxes and those indirectly helped other people. Now you are getting some of yours back. I don't think anyone who needs help should feel bad about it. Try not to let what you see as judging looks bother you. The people looking may be feeling a financial pinch themselves what with prices being so high.
Going back to school as an adult is different from high school or college the first time around. At least I have found it to be so. While your disability claim chugs along you might use this time to think about your strengths, including your bonds with your family, particularly the children. Life is about giving and receiving. I hope your life improves soon. You are inherently worthy because you are a human being. Your children value you and I hope you allow yourself to value your own worthwhile self.