I have had mild cramping since 9dpo (11dpo now). it is more sharp/twinge like & very low down in uterus and only on my bottom right side, compared to period cramps that are my whole abdomen and a lot more intense. could this be implantation cramping?

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.