Positive then negative

AF due today no show I woke up in the middle of the night really nausea and nausea for couple day's. Have had no peroid symptoms. Yesterday I tested positive with a vfl very noticeable and pink and today tested negative. My last AF was on August 20th. I tested positive on my ovulation test on September 4th and 5th. Am I testing too soon? First 3 pictures are from today the rest from yesterday. All done with first morning urine 5 minutes.