AF 12 DAYS LATE. PLEASE READ.

Anyone else??? Any ideas what it could mean???

I’ve been TTC for 6 months this go round. Each month I’ve always had a REGULAR cycle leading up to this month. NEVER been more than a day or two late. Took a test yesterday… still negative. I’ve done nothing to throw it off. Had abdominal pains on left side almost a week ago. NO bleeding/spotting.