How long ago was the extraction? As it would take time for a sinus to droop.
Which molar was extracted 1st, 2nd or 3rd. Typically the extraction would not lead to tmj, unless now the other teeth are making a premature contact on your lower teeth. If it was a recent extraction ; you had your mouth propped open, TMJ could temporarily ensue which usually goes away. If not, see a dawson or pankey dds.