How To Treat Throat Pain Along With Vomiting Red Content?

I vomited a bright red contents after eating too much food at once. the food consisted of a subway(italitian) 12 inch sub, 2 cookies, and five alive orange juice, yet the liquid was very red, but i can't be sure it was blood i just can't imagine what would have turned it red. I feel perfectly fine and even went to work today with no problems. 5 hours passed, my throat hurts a little now. What should I do?