My boss is on my case cause my personal life has become a distraction - do I have rights?

I work for a very small company (under 10 employees) - i have always been a good employee however in the last 6 months i have gotten divorced from a mentally ill spouse, moved 2 times, dealt with real estate and divorce lawyers, cared for a parent with cancer, tried to stay on top of my treatments for past cancer scare, and raise 2 kids that i have sole custody of. Sometimes I am distracted - do you blame me? Now he wants to talk to me tomorrow - Do I have rights?