All of your these symptoms;
1) some times it just makes voice weaker.
2) sometimes it causes pain that brings tears to eyes and voice completely goes away.
3) sometimes it is just like the sounds do not come out.
Would not indicate cancer, as you too mentioned. A cyst or laryngeal swelling or laryngitis may be a possibility. Reflux laryngitis also can cause this problem. Following investigations may be able to confirm it;
1) Barium esophagography
2) Ambulatory 24-hour pharyngoesophageal pH monitoring
3) Indirect laryngoscopy.
Following specialists are needed to work in tandem for treatment;
1) ENT specialist
3) Speech therapist,
Following measures are helpful:
1) Small 5-6 meals a day.
2) Last meal should be eaten 3 hours before lying down.
3) Avoid; fried or fatty foods, chocolate, peppermint, alcohol, coffee, carbonated beverages, citrus fruits or juices, tomato sauce, ketchup, mustard, vinegar.
4) Eat slowly so air is not swallowed.
5) Swallowing therapy by a speech-language pathologist.
6) Lose weight if obese or overweight.
7) Elevate the head of the bed by 6 inches.
8) Avoid tight clothing.
9) Stop smoking if you do.
An enlarged thyroid may also be responsible for it. Thyroid scan, an ultrasound and thyroid function test would rule out any abnormality.
The swelling near the ear can be a lymph node due to sinusitis which may cause ear issues. Parotid gland enlargement which is other possibility here is not likely for causative of these symptoms. Again a CT scan of neck will clearly diagnose any abnormality including this swelling.
It is privilege assisting you.