I remember being tested for it years ago after doing some BTCV work. We cleared a large pond of all kinds of disgusting things to make it all nice and pretty and build a boardwalk etc...
I had to carry a Weil's disease card and remember them making a fuss when I came down with some infection/cold and testing me for it but all ok and I'd been over the knee deep in rat and goodness knows what else infested manky water for days.
Evil colds seem to be doing the rounds at the moment and our office is all coughing and sneezing.
Worth a mention to your GP if you're worried, sure they could initially speak over the phone?