First of all, your heart wasn't beating really fast. It felt like that, I've felt it before. But if you actually put two fingers on your jugular, you'll be able to feel what is really your heartbeat. When I feel like it's beating fast and do that, I find out that it's actually quite normal. As for your paranoia, you have to distract yourself. Watch some good TV, listen to Bob Marley(:rasta: Bob Marley is awesome.), do what you gotta do. It's a great drug, and I'd hate for you to miss out on it because of a bad experience.

Oh and, as for getting more high? Hold the lighter a little bit longer, and then take the big hits. Keep hitting offa the pipe untill you feel like you're gonna cough. Hold back the coughs, exhale, and then cough it up. :thumbsup: