Don't stress yourself over your accent. In America, there are immigrants from allover the world. they all have their unique accent.The only thing you need to address is to express yourself in a concise and clear manner.
I had worked here for over 10 years. My experience is the more you explain, the more confused the other people are. Unless, you are requested to explain an issue.
The only difference between Chinese and Americans is Americans express themselves freely and directly. Chinese people worry too much about if others can understand them.