Trust in God and believe He will care for you. Vigorous outdoor exercise will strengthen the entire body, and also relax it. Exercise tends to neutralize the attitude and effects of stress. Avoid fatty and fried foods, all junk foods. Caffeine restricts blood flow.
Sugar increases blood viscosity as well as triglycerides.
Avoid food seasonings. Do not take any tobacco product or use alcohol. Nicotine causes constriction of the blood vessels and it produces plaque in them, both of which reduce blood flow. Do not be even in the same room where someone is smoking. Medicinal drugs for Raynaud's do not seem to help.