I honestly don't know why they gave them to you.
I am an ER doctor with specialty training in wilderness and expedition medicine. Unless you come to the ER with bloody diarrhea, abdominal pain AND fever, recent travel, they are not given. At the very least a stool sample was needed.
This sounds like a viral
infection- which can cause labyrinthitis (another type of 8th nerve involvement)- but it also can cause an 'upper respiratory illness'- meaning swollen glands, sore throat, plugged ears, cough, runny nose, sinus pain, etc. You may have some or all of the symptoms.
That being said, plugged ears suggests that there is some fluid trapped in the eustachian tubes- which is common in a viral illness. Taking a decongestant like sudafed or phenylephrine is very relevant for these symptoms. And you can hear weird noises when your ears have fluid because sound is not being conducted well. Clearing it up with a decongestant can be very helpful.
Antibiotics like cipro and flagyl are flushed out within about 3-5 half lives- in this particular case- within 3 days.
Hang in there. Focus on fluids, over the counter medication, eating and rest.
I hope that this helps.
Please leave positive feedback if it did :-)