I've known of two people who have contracted Weils Disease on separate occaisions, both via contact with water, whilst working on fish farms. It really hit them, they didn't get back to work for at least 6 months.
The sypmtoms of Weils Disease is flu like and if untreated will lead to jaundice and then liver failure. Worth letting the doctor know that it's possible you've come into contacts with rats if feeling unwell. If in doubt ask your doctor for a blood test as it will show up whether you've come into contact with weils disease or not.
All The Best,
PUG