PregChex

What pregnancy test is it that tells you how far along you are?

One of my friends were telling me about a pregnancy test that tells you how far along you are in your pregnancy,up to three months I think she said.What is the brand/name of that test.I have took two first response pregnancy tests and they both came out positive.I am trying to make sure with much more expensive pregnancy tests.What is the brand of that pregnancy test,and what are my chances that I really am pregnant from two positive results?