My first thought is stop calling yourself a fatty
In all seriousness, I highly doubt an SV. Your d would have gotten progressively worse and would be water. I also don't think you would have been able to eat a good breakfast or lunch. If you aren't used to coffee, it could very well be doing a number on your belly. I drink tons of it, so I've gotten used to it but it can be real harsh if you don't normally drink it.
I would not worry about SV at all. Put your feet up and let your belly relax.
Hope you feel better!