Hey Rafeeq, sorry to hear about your troubling dreams. Often snake bites, seeing snakes means that there is something very very negative that is happening in your life. could be someone close to you or distant, could be anxiety, stress etc. As others have rightly said, PRAY ABOUT IT. ASK GOD TO REVEAL THE THING OR PERSON TO YOU. its more mental/psychological than physical. so forget doctors or changing the position of your bed. its futile. it is often what we cannot see that attacks when we are vulnerable i.e SLEEP. Good luck