That is the message from money saving expert Martin Lewis as he urges the public to stay calm while uncertainty rages over the UK’s Brexit vote.
The former Chester King's School pupil said the economy risked further upset if the public start to panic about it.
Thousands are now worried if withdrawing from the EU could impact on a wide range of cash matters from mortgages, savings, and university fees.
But Martin, the man behind the MoneySavingExpert website, said the most important thing was not to make any hasty decisions.
He said: “The vote result changes the way people think or act.
“That’s why the markets have gone down – that’s why people have asked if they should complete on their house sale, or complete their bank account change.
“The danger of this ‘sentiment change’ is it becomes a self-fulfilling prophecy.
“People are worried about the economy so they don’t do things that they would have done otherwise, and that hurts the economy.
“We have to be very careful of the sentiment change issue.”
He said instead that change would be a slow process, and one which still contains several unknowns.
He said: “The most important thing to say to people is: ‘Don’t panic.’
“Nothing has actually changed yet. There is time for things to play through.
“If nobody panics then there will be time to make the decisions, so the best thing to do is take a deep breath, keep calm and carry on.”
Key changes could include an end to European Health Insurance Cards, cheap mobile data roaming and compensation for cancelled flights, as these are all regulated under EU law.
He said: “I would be very surprised if flight delay compensation continues when we leave.
“The EHIC card is interesting, because it’s not just the EU, it’s also the EEA.
“That just depends on what our relationship is with Europe in the future. The takeaway line is right now not very much has changed.
“The real change comes in two years.”
He added: “But the most important thing is whatever you voted we are going to have a new Britain.
“What’s important is that all of us work together to make it the best and fairest Britain it can be. I really believe that.
“That’s what has to come out of this. What we mustn’t do is lay in this position of dogma, and try and prove the decision was wrong.
“We’ve had the process, we’ve decided to leave, and we’ve got to make the best of it – all of us.”