confused am I preggers??

Courtney
Okay so I ovulated on the 21st of April, my period was due yesterday (5/5) but still nothing. I've taken 4 tests at 9 11 12 and 14 DPO all negative and I am totally lost. Lots of creamy white discharge and all the symptoms but why the negative tests??? Haven't tested in 2 days (last test on the fourth) and I'm just not sure what to do I don't wanna buy more tests if I'm not pregnant but my period still hasn't showed.