Sentence 1: While I was driving, I couldn't focus clearly because of my headache. 
 Sentence 3: I tried to straighten it out however, it continued to move 
 Sentence 4:  The right side of the car collided with another car 
 Sentence 5:  I had to park in the grass in order to see the damages 
 Option 1: I came across another car. 
 Option 2: My car started to sway back and forth.