my washing machine is leaking

Oh poor you - what a time for it to happen! There is only one thing to check and that is to see if the water is coming from the supply hose from the tap. Sometimes that works loose with movement of the machine. That of course will give you a leak all the time and not just when the machine is working. If it is leaking just when in operation then a seal has gone. Check the door rubber for splits - you may be able to patch it up. Failing that it is usually 'goodbye machine' unless you have a very cheap repair man or can tackle it yourself. In the UK, a callout for a repair man is a third of the cost of a new machine so it is just not worth a repair.

Check all hoses. That might be the only problem. that has never happened to me (yet) but that's what I would do before calling a repairman.