What a thread here!
Ok…
First the carbs come from the heavy whipping cream, not the coffee or the syrup. Remember the if the carb count is under one carb per serving they can legally list it as zero (and they ALWAYS do)…
So this means if one tablespoon of heavy whipping cream is .98 carbs they can list it as zero. A serving of real heavy cream is actually only about .6 of a carb, and a cup is about 6 carbs all together. (Check the carb count online)
As far as a pound and a half you gained I can almost promise it is water retention, not fat gained. Unless you totally porked out somewhere else during the day, there is no way the energy in ˝ cup of full fat cream can create a pound and a half of fat.
With that being said I do not blame you for being concerned about the weight gain. It looks like you might be sensitive to dairy. However it could also be from the sf syrup as well. I know Starbucks is still using sf syrups with Aspartame (Equal). If too much is used you can bloat like a balloon. Get only five squirts of sf syrup and sweeten with Spelenda if you need it more sweet. They also have vanilla sprinkles for the top but that too will add a few carbs, but not much.
It could also be that you ate something else during the day that affected you and could be totally unrelated to the drink. It also might be a ton of other things, stress, PMS, or blood pressure. You really cannot conclude based on one drink whether or not this did it. You might want to test it another time.
You might want to try next time just a regular decaf coffee, a little half n half (like maybe two tablespoons which will have only about 3 carbs) and Splenda. IF that does not affect you the same way, I bet it really is the syrup that affected you so negatively.
I am sorry you got messed up, I know how it feels to be frustrated and I would not want to cause another person trouble on lc...it's not always easy to find things we can enjoy and I was hoping to help. I am sorry it back fired on you. I guess that is why they say your mileage will vary, because we all are different and have different sensitivites. Drink lots of water with a little lemon juice the next few days and it should get rid of the retention.
Kellie