Super Confused

Grace
I am on CD 43 now, generally run about 30-31 and still haven't started. I had super light spotting around day 20. I took a test yesterday afternoon and saw a faint line. Some people agreed that it was positive, but suggested I retest again this morning to make sure. This one looks negative to me. Sooo confused! I have also been more tired than normal, sore breasts, slight nausea and aversion to foods, and swollen.  Any advice?