Cindy,
I found this recipe, by simply searching under Sweetened Condensed Milk through Google.
Hope, this will help. One thing, you didn't say, if, you were allergic to anything else, like eggs? If, you are, I would suggest that you use Egg Substitute in this recipe.
SWEETENED CONDENSED MILK SUBSTITUTE
2 eggs
1 c. brown sugar
1 tsp. vanilla
2 tbsp. flour
1/2 tsp. baking powder
1/4 tsp. salt
Mix all ingredients and use as a substitute for sweetened condensed milk in recipes for pies, bars and desserts.