Hello Philip my name is ***** ***** I will help you with this.
What type of goods/services are you selling please?
Your terms should be sufficient. You are making to clear that they are bound by UK law and any dispute should be governed here.
Therefore they are bound by the terms of the UK. In any event whilst it is possible, its unlikely that any Judgment in the USA would be binding here, given your terms.
But I would try and get insurance that covers you elsewhere if you can, just in case.
However you terms are sufficient - its binding on the person making the contract that UK law applies
Can I clarify anything for you about this today please?