Asking for time off.

My job is really stressful and I feel like it is taking a toll on my home life. I never want to play with my children, my husband and I don't make love anymore ( we haven't for about 2 months), and my home is a mess. I have anxiety and suffer from depression. How do I go about asking my doctor for time off? I am also worried about looking weak in front of my co workers and Supervisor. I don't know what to do but I know I need some time to regroup.