Overwhelming states of being reached through meditation

I'm wondering what the Buddhist tradition might say about the following state of being. Firstly a bit of background, explaining how I got there and how it felt: I practiced (what I understood to be) mindfulness meditation for six months through a simple book that came with a CD of guided meditations. It improved my life immeasurably. I got everything everyone says they do from the practice: More control of my life, less stress, more happiness, better resilience to the bad things that happen to us all. Even though I don't practice it anymore, I have taken this knowledge and understanding with me, and continue to apply it as best I can, without the aid of meditation itself. The reason I stopped meditating is because of a series of events that pretty much left me temporarily unable to work (I'm absolutely fine now!). I experienced an incredibly intense emotional explosion in my chest during one meditation, and in my daily meditations after that I experienced what can only be described as immediate and overwhelming bliss. My meditations were shorter, but extremely powerful (and actually became the highlights of my day). Unfortunately after a meditation of such power, I also found myself in a state of mind that was unable to work. I felt as if my ego wasn't quite ready to deal with the complexities of modern life, and rather than help my daily existence, this new state of mind became a hindrance. Talking to my clients on the phone, fielding their complicated questions, suddenly became a daunting task. And the part of my brain that allowed me to program websites (which is what I do for a living) was struggling to focus. It was worrying. I didn't feel as though I was in control of these feelings, or sometimes, even myself (I remember one time talking to a friend about these new experiences, and being unable to stop myself from talking -- I literally kept interrupting him with my "insights", very unlike me). Despite beginning as bliss, it quickly became a worrying experience. I reluctantly stopped meditating and, after a few weeks, thankfully returned to my normal self (perhaps even better than I was before). My question: Does this experience have a name in Buddhist tradition? I have read about "Spiritual Crises", and indeed it appears that what I experienced matches the symptoms of that, but what IS that? I'm guessing in thousands of years of Buddhist study that there are answers? (Although, I must ask that if you're just guessing loosely, that you don't attempt to answer. Thanks.) For example: This answer mentions the differences between two types of meditation: *Calm abiding* (Tib.: Shine, Skr.: Shamata) and *insight* meditation (Tib.: Lhaktong, Skr.: Vipassana), stating that the first is "safe" for everyone, while the latter could be damaging to certain individuals in certain situations. And finally, as a side question, can someone who has experienced such a thing learn how to avoid re-experiencing it in the future and continue meditating? Or is that, as my girlfriend asserts, just playing with fire?