Hello all and thanks for your replies !
Now, I know what is my problem. it's a Reiki Crisis or adjustement period, also called bubbling up period.
Everyone has this, but some more than others!
In my case, it's because some of my lower chakras are constricted.
What works for me ?
Drink lots of water and self-healing every day or more.
Starting from the soles of the feet and upward working on the 1,2,3 and 4 chakras. And also one hand on the hara and the other at the point the neck meet the shoulders.
Receive reiki from others !
Relax is important.
A good thing to do also, is to perform light and slow massage especially on the feet, legs and hips. Going very slowly enhance the level of subtle energy and opens the channels for healing.
Your comments are welcome.
Thanks and gratefulness to all !
Claude.