Spotting for 7 days

Tiffany

I had an iui 20 days ago. I did blood work 14 dpiui and it was negative so I stopped taking progesterone. I started spotting 12/13 dpiui and it hasn't stopped but it hasn't turned into a full period. Anyone experience this? I know progesterone can delay your period, this was my 5th iui, but it is different this time.