experience after first day practice of week 2, is this normal? does it mean something?

Hi!

Today was my first practice day of week 2. First i did the dissolving while standing, then the belly and side breathing, then the circling hands and finally the kwa ( all was about 40 min)

when i finished i suddenly felt very cold and i got headache on the forehead, sides and back of the head. After a while i had the need to lie so i went to bed. While lying i felt horizontal zig-zag vibrations crossing my whole body going from the top of my head down to my feet. It was not scary at all but a very new sensation!

After that my body was warm again but the headache disappeared some hours later.

i just wonder if this happened because i practiced too much (although i didn’t have that impression) or if it was just the energy flowing in an normal way, or could it be that i didn’t “close” my practice session “properly”?

is there any movement for closing the daily practice? or you just stop and that’s it?

thanks for any advices!