We are doing IUI!!!

I had my baseline ultrasound today cycle day 4 I was so nervous they would find cysts and we wouldn’t be able to start IUI. Instead he said my ovaries and uterus looked good! Starting letrozole 2.5mg today for 5 days. I have my next ultrasound the 18th to check follicle size. I am praying that all it takes is one cycle! Assuming follicle size is good the 18th, trigger shot would also be that day the IUI 36 hours later. And my birthday is the 22nd! I am being extremely hopeful and positive that we are going to have our rainbow!