Hi Karen
Before we can answer yhour post we need to know which ESA you are in receipt of, as there are three types NS ESA, IR ESA and CB ESA.
You may want to get advice from your local welfre rights organisation who can take all your circumstances into consideration: You can find your local Welfare Rights Organisation to help you with advice by clicking on the link below and putting in your post code, it will then come up with a MAP with a list of agencies.
advicelocal.uk Gary