Read Psalms 118:5  Distress is a hard word to understand; but is has a lot of meaning to it.  When a ship is out on the ocean and a strong storm blows up, that ship is in distress.  When a puppy gets lost and is far away from home, that little dog is in distress.  In our verse David said that when he was in distress, he called upon the Lord, and the Lord answered him.  God not only answered him, but God put David in a good place.  Not only a good place, but a large place with plenty of room and lots of green grass for David's sheep and plenty of cool water for David's sheep to drink and to be refreshed.  God heard David's distress and answered and helped him.  When you have a problem - a big problem - pray to God and He will hear, and He will help.  You can count on God to help you!