Ttc. i have a regular 28 day cycle, i'm currently on day 31. no af. light pink spotting. checked cervix, brown blood by cervix. bfn?

Pregnancy test: Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about 3 weeks for the embryo to make enough HCG to produce a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully.