Iam supposed to start on the first but it's the 4 and i hav a lite brown when i wipe sometime not ever time i go. so could this mean iam preg?

Could be: Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about two 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. Use first morning urine and follow instructions for the test carefully. If the result is negative repeat the test in 3-4 days, if you do not get your period by then.