I think you tested too early. I personally like the first response tests that you can take up to 6 days before a missed period. I have never used them that soon as they are most accurate after AF is due. But they have never steered me wrong! Best of luck to you!
I had a test done at the doc and a pap smear 5 days before my period was due and a week before I was due and both were negative but guess what I'm pregnant. Wait till the day after u miss then test, the most visible in my opionion would be the dollar store one dollar one that u use a dropper. They show u p dark no matter how far along u are