Hello, there has been a pain in my lower back right side. It happened 2nd time now.. in last 4 days and  it happened to ne while I am sleeping (between 4-6 AM) first time I thought it's a gastric problem as when I passed stool it vanished post 10-12 minutes. Same happened today but today I felt that there was some urine pressure but could not pass (though I passed urine while passing stool). The pain has again mellowed down post 15-20 minutes. So I have 3 doubts- 1. Is it because of my sleeping posture? 2. Is it a gasteric? Is it related to stone? I am flying out of India this Wednesday night for 10 days on vacation. Please suggest.