Hello & welcome,
Getting aches or pains in the jaw may occur due to wisdom tooth trying to come out in the oral cavity. But as you are 14 yrs old this possibility is less likely.
More important for you is to check those filled teeth for the integrity of the filled material or restoration which may require x-ray to be done along with due clinical examination by your dentist
If any that previously done filling is cracked, it may cause tooth to ache & that can be treated with refilling the tooth after proper cavity preparation.
Also, other teeth should be checked for caries and treated by filling with appropriate restorative material.
If most of the aching is present on bottom, there may be caries in cervical part of the related tooth which will be diagnosed with radio-graph taken by your dentist.
Don't use any kind of painkiller drugs unless you undergo proper dental check up.