Money/job anxiety

I’m 23 and have cancer so I haven’t been able to work. I was only working for 6 months since I graduated college, so I’m fully relying on my parents. I know they don’t mind but I feel guilty and anxious about everything I spend and that is spent on me. I have several other chronic medical conditions and just don’t know how I’m going to find working again and do something I can physically and mentally handle. Advice? Anyone have a similar situation?