I have sciatica in both legs I need to work out to lose weight but I'm so scared I will be in pain I am a mother to 4 kids my legs ache I stretch alot?

Weight loss. Please see your doctor or a nutritionist about the safest way to loose weight. Ask the professional about the ketogenic diet--low carb and higher protein. Lifestyle changes need to accompany this. A personal trainer at a gym can provide the best exercise plan for your situation. You can do it.