Jailbroken iPhone: problems with Cydia and Blackra1n uninstallation. Please help?

I have attempted jailbreaking my iPhone, Blackra1n appeared to work correctly. I went on to it and installed Cydia and the app icon was then present. But when I ran Cydia, it never got past the "Loading Data" screen. I looked in various places online for help and so I eventually ended up uninstalling Blackra1n. But the Cydia app is still there. And when I tried to re-jailbreak, the Blackra1n app did not show up on my phone, but Cydia is still there. Please help? THANKS