As you clearly mentioned that Last month issue. Called Acute otitis media with effusion..The sound in the ear called Tinnitus.
Now Still she is feeling something in the ear means, there may be some fluid left over in middles ear, which will cause feeling of heavy ness, blocked sensation, decreased hearing.
Next Steps
Need Investigation like Pure tone Audiometry, Tympanometry, x ray for Adenoids.
Health Tips
Steam , Nasal decongestant drops will help.