1st month off the pill and TTC

I've been on the pill for 11 years, and just stopped a month ago at the end of my pill pack. My husband and I have been TTC since then. AF normally would be due today but hasn't come yet, and I'm testing negative. Is a late period normal for having been on the pill for so long or could I have a false negative? Has this happened to anyone else? I've had cramping and VERY sore nipples for about a week now but no other symptoms.