I have this reasoning question (image)

So, what I did is I found the number of dots in this, which came out to be: 2 5 11 7 13 19 5 ? 17 And I can't really find what's the pattern in this. What I could see is : 5+6=11 13+6=19 x+6=17 so, x = 11
But what will be with 2,7 and 5 then? Please explain me :)