How accurate are these? i know you plus 2 weeks (you're not pregnant for, just from LMP) so my last period was 25th march. Took the test 30th April and it said 2-3 weeks (since conception) does this mean i conceived anywhere from the 9th April onwards (My due date is 1st Jan) but then i was technically 4-5 weeks pregnant? but conception would have happened on the 9th onwards?