Do US passport holders need a visa to visit Thailand for 7 days?

Judging from the name and profile photo I’m going to guess that you are Haitian living in US. Therefore don’t worry about all the negative comments with regard to your English proficiency since it is of course your third language after French and Creole. You can enter with a Visa exemption up to 60 days at present which might drop to 30 days depending when you are travelling. Therefore nothing for you to do in advance provided you have a valid passport from the US with at least 6 months left before it expires.

Up to u

Are you asking or are you making statement?

That depends on how long your trip is