In the rarest of lucky circumstances, you can get away without getting a re-RCT whenever the nearby clinics open, that's a future prospect, as of now do this -
Next Steps
roll a tiny ball of cotton, and try to stuff it in the cavity area with the help of tweezers
Health Tips
ensure, that no food gets lodged in this cavity.
if the cotton ball comes out, use another one, keep replacing it and at no point keep the cavity exposed, use a floss regularly in that area especially if it's a sideways cavity.
last and not the least, warm salt water rinses, two times a day