Is it late or am I pregnant?!?

So my AF was suppose to start Friday! I took a test on Sunday (Clearblue Digital) and said "Not Pregnant!" 😩 However, it's now Tuesday and I haven't started yet! I have been extremely hungry, using the bathroom a lot, sore breast. (These are things I sometimes can't tell if it period symptoms or start of pregnancy.) what should I do? I leave for Disney World on Wednesday, and I don't want to ride any rides if pregnant! But I'm confused to have received and negative test already! WHAT SHOULD I DO!?