Energy Currents During Meditation

It has become a bit difficult to meditate, it's not that I can't remain still or relax, I just can't bring myself to schedule a session like I used to. I don't have that same motivation I once had. Now I meditate when it feels right and I can do it naturally.

Last week I managed to meditate once. As I let my attention to thoughts and sounds play out, in a seemingly ordinary state there was some sudden heart palpitations, fingers and hands twitching, some movements in my thighs and then energy shooting up my legs. I felt like my entire body was being charged with electrical currents.