I work for a small business in CA. Out on (DR. extended) maternity leave and now back to work. Was out 7 months. My anniversary date for vacation is August 1. Am I entitled to my paid vacation or does he move my anniversary date back 7 months? Now that I am back to work, when do my regular benefits(sick and medical) start?

Whether your are entitled to vacation time now or whether he can move your anniversary dates depends on company policy. The same goes for sick time. If your medical insurance was cancelled or you were put on COBRA, when it starts being company paid again (or starts at all) depends on the insurance contract.