Stomach bug or pregnant?!

Rachel
So my fiance and I have been trying for 4 months now and last month finally tracked my ovulation pretty close and had sex ALOT for 4 days straight. I'm due to start my period on friday so we took a family trip to disneyland today for 3 days and I can't enjoy it much because I can stop throwing up... we come here all the time and I've never felt sick... what do you think? Too early to test? Waste of money?