For scardy people like me
I get temporary fillings from boots and fill me own teeth.
The kit is ready mixed and costs about £5.
this lasts for about 6 months then you have to top it up.
The pot has enough filling for 3 or 4 goes
Use pain killers to stop the pain then clean out the hole with hydrogen Peroxide
on a cotton bud, let it dry , or use another cotton bud to dry it.
pop the filling putty into the hole and wait an hour before eating or drinking
hope this helps
i couldnt get an appointment last year, when a did get in to see the dentist i mentioned i was thinking of using temporary fillings, his advice was never use temporary fillings you likely get the tooth infected,you have to go in the end,best just to try and get in as soon as poss