I tested positive this morning as I felt queasy and have been shattered for the last few days. I used a fertility monitor for the first time this month and it indicated that I probably ovulated on 4th Feb. I had a miscarriage in December but my hcg levels were below 15 at the beginning of January so I know everything was back to normal... Is it right that the test can be positive only a week past ovulation? I am confused!