I got period the time i was expecting it.the 1stday,it was a bit heavy flow,theres even blood clots when i pee,the 2nd day my flow is slowly getting lightercan someone tell me, what happened to me is an actual menstruation?and not implantation bleed?

See below: 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.