Dear One,
Your experience in truth is wonderful. It’s a little bit like the one of Swami Pranabananda as described in the Autobiography of a Yogi: “‘At work, I find an overpowering sensation rising in my spine. It permeates my whole body, unfitting me for the performance of my duties.” Yogananda explains: The torrential bliss is overwhelming, but the yogi learns to control its outward manifestations.”
You received a little taste of it, a small degree of it.
The thing is this: when the inner energy starts to flow a bit more strongly in the spine, we think that it is really powerful. Sometimes people even feel what seems to be a headache, or think it’s too much, or say they can’t concentrate at work. What you need to do is strengthen your nervous system. Your system is not yet tuned to this increase of inner energy.
Yogananda taught the Energization Exercises to strengthen us. If you don’t know the exercises you may just practice the “20-body part recharging.” I describe the technique below. Please practice it well: tense until the body parts vibrate. With great will, mentally send energy from the medulla oblongata to the body. If you do so, your nervous system will become much stronger and that rising energy won’t bother you anymore. You will learn, as Yogananda put it, “to control its outward manifestations.”
All the best,
jayadev