Yes sounds like spontaneous kundalini to me!

Please read the Kason book (she was head of kundalini research network), it has vital info, and I strongly recommend you talk to the people at the kundalini support network -- google it. Esp. talk to Susan Carlson and Santiago Dobles. They know it all and they will be able to offer real energetic support. They also have a forum.

If you would like to learn a couple of grounding exercises, pm me. But I really suggest you talk to those guys.