I am so confused this month! My cycles run 31 - 35 days. I ovulated then on December 23/24. We had sex from December 21 - 25. Then on December 29 which was just CD 22 I started spotting. I bleed off and on until yesterday. The bleeding was any where from spotting to light flow, and mostly redish in color. Plus I have had nausea off and on for 3 days. Could I possibly be pregnant? When should I start testing?