Angie Samaniego
Hi Tarawit!!!
What I have learned so far from meditation is that you should feel comfortable, but not so much you fall asleep. Maybe, you might want to adjust your sitting position, or becoming more aware of what you are doing at the moment of meditation. You should listen and do as the teaching monks assign and that way you'll do better.
I think I've fallen asleep for some minutes once, and I felt very guilty. Then I just realized it is all part of the experience. Hope this helps. Let's see if the coaches reply to your post and aid you a little bit, ok?
Tell me how it goes!
Loce-Peace-Unity :)