Couldn't say thank you.

Couldn't say thank you. Somebody lifted a pallet for me at work and I was standing there staring at him trying to get out a thank you. He said what? and smirked. Out of panic I had to admit that I have a stuttering problem and that I was trying to say thank you. He said no problem man but still damn I feel weak. Its the first time I admitted my stuttering to another team member at work.