Question

I had intercourse on april 29th and my period was supposed to be on may 13th. but still havent had a period and its already may 25th. i took a pregnancy test on may 21st and it came out negative. so what could be going on

Answer 1

Stress could be a factor 

If you got sick or had a cold, that could delay it

Weight loss is something else that affects your cycle

Lots of exercises will also 

Changes in schedule might have something to do with it 

Or

Any medications you have been taking. 

Hope This Helps!!!