Is this spotting

Hi everyone, I have a question that hopefully can be answered. My husband and I are trying to conceive. My ovulation days were the 2/3 if dec. yesterday when I wiped I noticed a tiny bit of pink blood on my toilet paper. This morning I took a preg test and it come out beg. My period isn't due until the 16 or the 18. What do you think this is? Can anybody help or has had this same situation?