I'll be honest, diarrhea and cramping 2 days later aren't hangover symptoms. It does sound like you got a SV. BUT there's a lot of good news- the biggest is that you're over 24 hrs into it which means it's on it's way out! The worst is over! AND you're probably not going to get another one for at LEAST a year or two (probably even more!) and finally, the v* is over. It's moving through you past your stomach now. You'll be better soon and stronger than ever!