I have a dry cough and it's not going out, it is been for 3 days now. then it results to no voice, i can't speak. please help me what are remedies.

Hot tea, gargles: This is viral and will take a little while to work itself out. Throat lozenges, salt water gargles and hot tea are the best thing.

Remedy: For sore throat – gargle with warm salt water (1/2 tsp salt in 8 oz of water). * for congestion – saline nose drops or a neti pot. *for anti-inflammatory effect ; mobilizing mucus- homemade chicken noodle soup.**for hydration- lots of water. Try clear broth. * add honey ; a small amt. Of lemon juice to chamomile tea. Use lots of voice rest. Do you have a humidifier that you can use?

Viral: You most likely suffer from a viral infection which should improve in a week or two. If not, see your doctor. You can try cough drops to soothe your throat but there is no specific treatment for this otherwise.