Hello. I have inadvertently left a tampax in for 2
It's ok to wait...
Infection and sepsis was a risk when the tampax was left unattended. The bad smell and lot of discharge indicated it was getting infected. Now that the tampax is out, body defence should be able to over power the infection. If there is a necessity antibiotics will be prescribed to you by the doctor.
Since you are alright now and do not report of fever/chills, abdominal pain and discharge, I guess the risks of getting into sepsis is low. You may wait until the morning to see a doctor. Discuss about the need for antibiotics.
Hope this helps. Let me know if you need clarifications.