I was 2 weeks late on my period and did a pregnancy test which was positive. But then I got my period. I did another pregnancy test while on my period which again was positive. I have done several since which say still positive but my conception time has lowered. Why is this? Also, I have no pregnancy symptoms..

First, not everyone has pregnncy symptoms. Second, having 4 kids myself, pregnancy tests rarely give a false positive, almost never. My suggestion is go see a doctor for a blood test since that is the most accurate. You could be pregnant and having something called "break thru bleeding". I was 4 months pregnant with my 3rd child and that happened to me. The best thing is to see a doctor. Wishing you the best of luck.

Tests can always be inaccurate. Get a blood test done it'll tell you for sure if you're that worried.