How can I treat stomach pain from having whipped cream?

It will go away. Lactose intolerance is self limiting. You'll be fine before tomorrow. Consider taking gas medicine. It is over the counter. You can also take lact-aide should you want to eat whip-cream on purpose next time. http://www.walmart.com/ip/10294224?wmlspartner=wlpa&adid=22222222227000000000&wl0=&wl1=g&wl2=c&wl3=21486607510&wl4=&wl5=pla&wl6=19880599990&veh=sem.