Which test is better to rule out pregnancy.. And is doing the test 2 days after getting low flow period give accurate result. And if bhcg is negative Doing 2wice it means pakka confirm no pregnancy? Or we have to repeat test? Last time sex - 5th april Is there any chance of levels to go up later if Last periods - 25th March then 25th April had periods but flow was less. Did bhcg 28th Apr and 2nd may - neg