interviewer no show

i have my dartmouth interview today, and it was supposed to be at 6 pm. it’s almost 6:15 and i haven’t heard back, i’ve been on the online link since 5:45 pm. i verified the time zones and all… and i emailed them around 6:10 😭 what do i do?? i feel so disappointed since my interviewer works for a company in the field i am going into and i was so excited