• Understanding that, I lost my words for a while.
• Understanding that, I lost my words for a while. (Not sure exactly what you mean here. I want to say that it should be "I had no words for a while," or "I could think of no words for a while.)

Sprachjunge
Good job. In English, we might SAY, "I laughed so hard that I got a cramp." or "He made me laugh so hard I couldn't breathe." What you might see WRITTEN are phrases such as "She was doubled over with laughter." or "She could not contain ...