Is black coffee more likely to cause an upset stomach than coffee with creamer?

I normally drink my coffee with a bit of creamer, but I ran out so today I drank it black. Now I really feel like I’m going to throw up. Is that coincidental?
I drink coffee most days, and occasionally I will drink it black. I don’t see how it would be less irritating with creamer, but I’m wondering if it is as simple as that. I haven’t had more coffee today than usual, or anything obvious like that. I hope I’m not getting sick. :\