Resin based Composites are most conservative & if the filling is done by experienced hands , then it can last many years to come. Regular check up is certainly advised though for a long run.
Next Steps
Kindly do a thorough check on the specialist you intend to visit.
Health Tips
Do not waste time & seek help & intervention at the earliest. Regarding the cost ….. anything the experienced specialist charges you will be worth it for sure. All the Best