First IUI 9/1/17

My husband and I have been trying for our first for almost two years now; I swallowed my pride and we decided to let a doctor intervene. I had the trigger done 8/31, IUI done the first. I'm currently 6dpiui and I have had brown spotting since 4dpiui- is this normal, or has anyone else experienced it?! I called the nurse and she said it was normal for where I was in my cycle. I've also been having the STRANGEST sensations-- I'm really trying to stay off google-- any advice would be GREATLY appreciated!! :)