I would not count on any test kits that you can buy. Most of us have seen them used time and time again and often fail the user with results that are all over the place. The best thing to do is find a source you know you can trust, not take chances with the unknown and have the peace of mind you need and want. If you look, @Finestgears has many testing results posted which they are having done in a manner none of us could do. I would give them a shot!
Stick with trusted sources and you never have to use this very unreliable kits. I would strongly recommend @domestic-supply.com who has the strongest reputation you are going to find!
The test kits are not reliable at all. I recommend first making sure your source is legit. I highly recommend Domestic-Supply. Then, just get bloods 4-5 weeks in to see where things are at.