Always have a way to call for help. Keep a cell phone with you at all times. Or talk with your healthcare provider about how to set up a home monitoring service. This involves wearing a chain around your neck at all times with a small device attached. If you fall, you can press the button on the device. This alerts emergency responders.
Make changes in your living space to reduce your risk of falls. It doesn't have to cost a lot of money. Here is a list of supplies you may need. At these stores, you can also find professionals who can help with installations.
Above all, try to stay calm.
Be sure to get checked by your healthcare provider for any injuries.