2 positives and a negative..no bleeding

Kayla
So as of today I am 4 days late for my period. I took 2 different brands of tests on Saturday which is the day I was suppose to get my period and I got two very positive tests. So now 4 days later I took a first response test to see how much darker the positive would be(wanted to use a picture of it for our baby book) and the test was negative. I am having no bleeding or cramps and my boobs are still as sore as ever and I'm having frequent urination. I got a blood test done today, but I haven't heard anything yet. Does anyone have an idea of what could be happening? Is it possible for me to still have a healthy pregnancy?