Toddler super clingy 2nd iui!

Okay ladies so I had my 2nd <a href="https://glowing.com/glow-fertility-program">IUI</a> done on July/25

I’m currently 7dpiui & 8dpt. My 2 year old had been crying ALL DAY since yesterday. She seriously wants only me. She will cry when I leave the room or even to go to the bathroom she will cry. ALL SHE WANTS IS MOMMY! which doesn’t bother me a little but I just want to know why!!! Can toddlers sense pregnancy? Even though I know I’m WAY TO EARLY!