Question on getting pregnant and why it's not happening??

Kylyn
Hello all. I have a serious question about trying to get pregnant. 
My husband and I are trying to conceive and we are having a difficult time. I am tracking my ovulation and seeing when I'm most fertile. 
Every month for the past 3 months we have tried and nothing. But the weird thing is, my period is really late every time! Like late by 4-5 days, so we get excited and take a test, but it's negative and then I usually get my period like the next day (on the 5th or  6th day it's late).
Is this normal? Has anyone else experienced this before? 
I feel like my body is broken or something and it's disheartening. 
We have even got a FALSE positive one time that my period was late... And then I ended up getting it a couple days later.