As per your history, you go through all necessary investigation s/o reinkes edema or in easy term fluid accumulation between layers of vocal folds, which cause pressure over vocal fold and hinder it's mobilty
Keep regular follow up with ENT specialist
Next Steps
1. TAB AUGMENTIN 625mg p/o twice in a day after meal for 3 days
2. CAP RABLET D 1cap p/o twice in a day empty stomach for 5 days
3. TAB DEXA 8mg p/o twice in a day after meal for 5 days
Health Tips
1.continue speech therapy
2. Take tummy full diet
3. Avoid any addiction (like smoking, tobacco chewing, etc) if any