4 days until my period hopefully doesn't show!

TTC #3! I've done so well to not test early, but it's starting to kill me! What are your favorite early tests? My son is almost 2. I tested probably 4 times the week that i was supposed to start my period with him and they were all negative. I didn't get my positive until the day that I seemed to have started but only bled a few hours and tested that night and finally got my positive. All I have right now is one 88 cent test from Wal-Mart, but I'm so tempted to go grab an EPT or First Response to pee on in the morning.