Don't do that D: . Instead of buying fish to see if they'll live, get an ammonia tester. Walmart sells a good quality water test kit (API Master Test Kit) for all of 20 dollars. It will last a year (easily), and will tell you if your tank is cycled (0 ammonia and nitrites with visible nitrates), and/or if it is ready for your fish.
it also doesn't sound like you truly cycled
it, because fishless cycles typically take about a few weeks to a month, especially if not seeded. What sort of planted tank are you attempting? If it is an NPT, and you are using soil, be sure you used one without any fertlizers and that you topped it with sand. If it's just a tank with a few plants, then a substrate meant for plants like eco-complete or flourite will do the trick.
Petsmart sells them for about 8 dollars, though I'm not sure if all petsmarts have them (Mine just got them last wednesday).