Progesterone question?!

I recently found out I'm pregnant after having an <a href="">IUI</a> (we have been trying for 6 years). My HCG levels are good but my progesterone is low (below 15), they put me on a progesterone suppository twice a day. Anybody have a similar situation? Did everything work out? I really don't want to lose this baby especially since we've been trying for so long. I would really like to know your stories!!