Negative thoughts get us nowhere.
"We can never see the sun rise by looking unto the west. " ~Japanese proverb, Streams in the Desert
When we keep our minds fixated on the pain, on the hurt, on the problem, we become powerless to see a way out.
We should dwell on the problem just long enough to identify a solution to that problem.
"A discouraged soul is helpless. He can neither resist the wiles of the enemy himself, while in this state, nor can he prevail in prayer for others...The very instant you wholeheartedly turn away from every symptom of distrust and discouragement, the blessed Holy Spirit will quicken your faith and inbreathe divine strength into your soul." ~Streams in the Desert
"For unto us was the gospel preached, as well as unto them: but the word preached did not profit them, not being mixed with faith in them that heard it." Hebrews 4:2
One of my favorite preachers, Bro. Cham McMillan, said it this way:
"God is full of solutions, and he is just looking for people to give them to."
That negative thought pattern in which we are indulging?
There is an answer, a solution, to it.
We will only find that answer when we wrench our thoughts away from the problem and begin to search by faith in God's Word for the solution.