Yes, Mary, your hearing can be affected by chemo, especially if you had Carboplatin (or other drug in the platin family). I have tinnitus from it. The doctor tried to say it was "rare" but since they do not have us do a hearing test before and after- I am not sure it is as "rare" as they think. The term is for this is "ototoxicity" and the NP explained that hearing is usually affected by two means-
The little"hairs" in our ears that can be damaged by loud noises, etc. can also be lost like the hair on our head. Unfortunately, these do not regrow, And then just like neuropathy, the drugs can damage the nerves needed for hearing. And that damage may not show up immediately,
For me, one day I was washing dishes and heard "cicadas" in their constant song. I am a master naturalist, and was not expecting an emergency of the bugs in our area. So, after finishing dishes, I wandered outside to see if I could find the source, and realized, the volume- which should have increased once outside- remained constant, I covered one ear, and then the other, to find the noises were in both ears.
Now 5+ years after ending chemo, the noises are still there, I used a sound machine at night to distract from it. It did improve somewhat on one side- but there is no known method for improving either cause of hearing issues from chemo,

Chemotherapy Drugs:
Cisplatin (Platinol): A widely used chemotherapy drug known to cause hearing loss in a significant percentage of patients.
Carboplatin (Paraplantin): Another platinum-based chemotherapy drug that can cause ototoxicity.
Oxaliplatin (Eloxitan): A chemotherapy drug that can also lead to hearing problems.
Vincristine (Oncovin): While less commonly associated with ototoxicity than cisplatin or carboplatin, vincristine cGan still contribute to hearing loss.
Doxorubicin: Another chemotherapy drug that can be ototoxic.
Gemcitabine: Can be ototoxic, especially when combined with other ototoxic medications.
Cyclophosphamide: Can be ototoxic, especially when combined with other ototoxic medications.
Farmorubicin: Can be ototoxic, especially when combined with other ototoxic medications.

Good luck, I hope you can find another cause, and that whatever you are experiencing can be treated and ends up being a temporary annoyance.
Hugs!

Thank you for the information virginiavalley.

Absolutely awful.

Hi Mary, I have a loss in my right ear also and I don't have lymphedema, mine is just age related and from previous infections .