PLEASE HELP!

So about a week ago I took a pregnancy test and nothing showed up immediately but after waiting a but I noticed that there was a VVVVVVVVVVF line. I waited about four more days and tested again. This time, the second line showed up pretty bold but started to disappear a lot. I waited about a minute or two and it also came out extremely faint. This has me really confused an am unsure what to do. What do all of you think of this situation? I plan on testing again soon.