I agree with Gellia - you could have an infection around or underneth the tooth - get to the dentist ASAP!
Hi,
It's possible you have an infection brewing. You really need to get to a dentist for an xray to see what's going on. There may be decay under the filling. Please make an appt. An untreated infection can slowly dissolve the bone holding in your teeth and they can fail completely.
I lost my top front four because of the exact same thing. Make the appt.
Hope this helps.
Best to you,
Gellia