I last had a period 7th -11th december, ive nit had another since. have had unprotected sex during the times. had some spotting on two days but only lasted few mins. had more 4 days later again hardly anything. wondering if it could mean im pregnan?

Pregnancy test: Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for 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.