There are lots of products available to use at each stage of your period which will help prevent any leakage. There is actually a rhythm to your flow. It's usually pretty light at the beginning and then around day 2-3 it's the heaviest, so knowing that can help you plan what products you need. Sanitary products like tampons, pads and liners come in a range of absorbencies. This is so you can use the ‘super’ absorbency products for heavy days, ‘regular’ for medium flow and ‘mini’ for light days. For added protection against leaks you can always wear a liner with a tampon so that if leaking occurs you are still protected.