If period starts on time but not heavy as usual is there any chance of preg? Bled thru tampons still during period. Sperm was wiped on vag b4 period

Maybe not, but... A urine pregnancy test done correctly will give a reliable result 3 weeks after sex (or when conception might have happened) or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and therefore lead to a repeat test. If a woman has her normal regular period, then she is not pregnant, and the test is not needed yet.