Stay away from all sugary drinks! Bacteria in your mouth turns sugar to acid which will eat the inside of your tooth faster than the hard enamel outside.
If you can take a Q-tip and dry the inside of the tooth really good, place the temporary filling material in and press it in hard. Gently bite down so you make a dent for your opposing tooth to fit it.
Wish for the best till July 1st! I think you'll be OK