If you are feeling overwhelmed and feel energetic or feel energy rushing throughout the body, then it probably is that one of your chakra is opening up.
If t is excessive then you need to 'ground' the energy and balance the chakras. Visualse the energy you want rid of leaving through roots which some out of your feet and into the earth. Next visualize each chakra as an even ball of light with the appropriate colour.
I agree with Hecate but also you might be buzzing psychical it all gets overwhelming at times you need to make sure your grounding & centering. Take time out to relax, chill out, maybe listen to some soft music, have a soak in the bath & meditate.You have to learn to calm down as sometimes I can have so much psychic energy if I don't calm down I'll be bouncing off the wall. Blessed be!
Honestly, though, what you're experiencing is common with energy working.
The other night, I was meditating on the Page of Cups, which is a card tied to psychic development. I awoke after less than an hour of sleep and was fully energized, with my sheets clinging and moving around my skin like I was full of static charge. I recognized the feeling because I tend to shock myself when touching doorknobs or people quite a lot if I don't ground every couple hours.
Read this thread: http://www.spellsofmagic.com/read_post.html?post=507822
In it, LillyMoon discusses and gives some great insights into meditation and centering. I also list a good grounding visualization that you should perform fairly regularly throughout the day. It gets quite intuitive after you do it a few times a day for a week or so. You know you're ungrounded when your feet stop tingling on the soles, you are becoming indecisive and hesitant, etc. When you're grounded, you're fearless. Note, this isn't the same as reckless, it just means that you aren't ruled by your ego and its many internal struggles.