Pink spotting

Mallory • Married 💍 and mom of 2. Have lost 3 in the past but hoping to give my husband a child of his own.

I’ve had pink spotting for four days now. Is this normal or common??? I’m on cycle day 18. I had one small reddish chunk come out on the second day of spotting but only light pink the first day and the last two days. I’ve never had this happen so I’m not sure what to make of it.