i agree, try weening yourself off so much coffee. its fine in moderation..but 5 cups a day isn't moderation.
try drinking a cup, then have 8oz of water, then a second cup...again followed by water.
I suspect half the reason you drink so much is the habit of sipping on something.
I'm also not a fan of Equal. I use regular sugar in my coffee...4 cubes in fact (its a tall mug), and low fat half/half. a tablespoon of fatty cream isn't gonna wreck your diet...and I'm inclined to feel that natural products in moderation (like sugar, olive oil, etc) are better than going overboard with man-made alternatives (like Equal, trans-fats, high fructose corn syrup...to name a few)