The relationship between creativity and focus
I can't really answer your questions as they relate to your ability to be creative. Also I'm unsure as to how 'focus' is defined, however, I know of research linking both attention and working memory to creativity which you may be able to draw conclusions from.

There is some mixed research to back the idea creativity and attention are linked; it has been hypothesised that individuals who suffer from ADHD (and thus a widened attentional focus) may have higher creative abilities than non ADHD individuals. One study on teens found that although those with ADHD out performed those without on tasks that involve overcoming the influence of examples, they showed a reduced capacity to generate a functional invention during an imagery task (Abraham et al 2006). White and Shah (2006) found similar results in adults and suggest than the disparity in creative ability may be linked to inhibition.

There has also been some research suggesting that creativity and capacity of working memory have opposing characteristics possibly in terms of diffuse attention. Working memory (WM) is an essential component for human
higher order cognitive activities (large capacity for WM could come under 'focus'). Attention and WM share neural substrates and they are cognitively deeply associated (Awh and Jonides, 2001). Takeuchi et al used fMRI to investigate the link between WM and creativity and found that individual creativity, as measured by the divergent thinking test, is related to the inefficient reallocation of attention, congruent with the idea that diffuse attention is associated with individual creativity. 

References: 

Abraham, A., Windmann, S., Siefen, R., Daum, I., &amp; Güntürkün, O. (2006). Creative thinking in adolescents with attention deficit hyperactivity disorder (ADHD). Child Neuropsychology, 12(2), 111-123.

White, H. A., &amp; Shah, P. (2006). Uninhibited imaginations: creativity in adults with attention-deficit/hyperactivity disorder. Personality and Individual Differences, 40(6), 1121-1131.

Takeuchi, H., Taki, Y., Hashizume, H., Sassa, Y., Nagase, T., Nouchi, R., &amp; Kawashima, R. (2011). Failing to deactivate: the association between brain activity during a working memory task and creativity. Neuroimage, 55(2), 681-687.

Awh, E., &amp; Jonides, J. (2001). Overlapping mechanisms of attention and spatial working memory. Trends in cognitive sciences, 5(3), 119-126.