Yeah that cycle was way too short but I had fish store employees tell me the same thing when I started the bobby. I had one fish in cycle take almost three months, I'm going to try a fishless cycle soon. All you can really do is get that kit, watch for ammonia, nitrates, nitrites, and do plenty if water changes. You are likely going to have some fish die, do not add anymore when they do. If you take the dead fish back most stores will give you a credit for when your tank is fully cycled. You could add some air stones to help with the gasping Of aiir as that is probably a sign of high ammonia levels which is not good. Water changes are really your only chance to save some of them now. It's ok, just caulk it up to a learning experience.