I haven't gotten my period, but tests say negative

Blanca • Hi my name is Blanca I am 26 years old. My husband and I really want a baby! Been trying since 09/15. Trying to be fit 2
hey girls!! I'm new here! 
So my last period was on January 23 and only lasted till the 25th. I remember having sex on the 22nd. I am very late and have tackle. Two at home tests which say negative (the tests are from the dollar store so don't know how accurate they are 😏) I'm starting to worry. We have been trying to have a baby since September 2015