Following the design and data described in [this question](http://stats.stackexchange.com/questions/11887/is-this-design-a-one-way-repeated-measures-anova-or-not), I did a simple one-way within-subjects repeated-measures (RM) ANOVA and found some significant p-values. I then applied non-orthogonal post-hoc Tukey's HSD tests, and when I got significant results I applied Holm-Bonferroni (1979) correction. Whenever some p-values survived the FWER correction, I calculated 95% CIs and mean for the associated pairwise comparisons.
 
My question is: If I don't observe a significant result at any of the above steps, do I have to carry out a power analysis for the RM ANOVA, apply [Tukey's HSD test](http://en.wikipedia.org/wiki/Tukey%27s_range_test) or [Holm-Bonferroni](http://en.wikipedia.org/wiki/Holm%E2%80%93Bonferroni_method) adjustments, or do I simply report results from the RM ANOVA without doing the power analysis?

The problem is that I'm starting to immerse in biostatistics only after my experiments, and unfortunately I didn't run a power analysis beforehand.