Ok..starting to freak out

Tomorrow is the last day of the Provera so now it's a waiting game for AF to arrive so that I can start the Clomid. I usually only have to take it 5 days but my R.E. wanted me to take it 10 days so I really think it'll show up soon.....which is kinda scary. I may be on the Clomid by next week and in the next few weeks I'll know if it worked...and soon after that if I'm going to be a mommy....ahhhh!!!  Nervous, anxious, and excited all rolled into one. Its also nerve wracking because if it doesn't work or the IUI doesn't take then what? :(