My legs have been cramping down the front of my shins for the last 5 days causing my legs to feel weak and causing pins and needles?

Need to examine: It is not feasible to provide a meaningful opinion without additional history, physical examination and may be some tests. Make sure that you are properly hydrated and sufficient electrolytes. A quick way to address that is by drinking orange juice. You cannot overdo it. If drinking 2-3 litres of juice does not help it would be prudent to see your doctor. Wish you good health!