Does pregnancy test ahowing faint positive result is an evaporation line?when i took my test result was -ve,after several hrs it was faint +ve,prego?

You tell us: Only you know which brand of test you have and what the specific instructions say about the timing of reading the results. It sounds like when you were following the instructions you were not pregnant and the test was a valid one. After the test time frame is accomplished you throw it away. You don't keep it and keep reading it as if a different result will appear.