You can definitely do a couple of easy DIY tests right now to confirm if water is leaking! Before calling anyone, I recommend checking out this practical troubleshooting guide on https://leaksrus.com.au/how-to-detect-a-leak/ They suggest two brilliant initial tests: turning off every single tap in the house and checking if your water meter dial still creeps over a couple of hours, and putting a few drops of food dye into your toilet cistern overnight to see if it seeps into the bowl without flushing. We tried the meter test at our place when we suspected a slow leak, and sure enough, the red dial kept creeping! Once we confirmed it, we hired Leaks R Us to do the actual non-invasive location work. Their tech used advanced acoustic devices to pinpoint the exact broken joint behind our laundry cavity in no time. Definitely run those basic checks first, then get them out to trace it!