Beware some women are mean on here...
Anyways, you're story reminds me of myself.
We tried to get pregnant for 2 years and nothing.
I would think I was because I'd be 2weeks or a month late and then nope nothing, my tests would come up negative.
So my doctor suggested we try something new and it worked!!
She said " after your period, DON'T have sex for 6-7 days. No Ejaculations for him AT ALL for 6-7 days either.
Then try for 3 days."
She said try this for a few months.
It worked the very first time :) thank God.
I gave the same advice to my friend and it worked after 2months!!
I know the disappointment of seeing the negative symbol but maybe wait another week or 2 and retest.
If still negative, maybe try what my doctor told me.
Sorry my msg is so long.
Hope this helps.
Good luck!! :)