No period and not pregnant ?

Samantha • 08/17/15 VJP; 06/04/19 RMR💓

I haven't had a period since June 2 and I keep taking tests they all say negative so why am I not getting my period? I haven't been irregular in a long time so it's making me very upset cause we are trying but without my period how do I know when or if I'm ovulating ugh I'm trying to be stressed out but it's hard too