How to republish??

For the past few hours, I have been trying very hard to republish my blog. I did some changes to its layout and posted a few test postings but these changes were not reflected at all. So I went about surfing for solutions. Tried adding a ? behind my url and it actually worked!! So I really hoped this posting will show! Those computer savvy persons, please don't laugh at me ok? If anyone know of a permanent solution, please do let me know!