How do I know if my roof leak needs urgent repair?

I first spotted a faint stain on the ceiling after a light shower and didn’t think much of it. But after a recent storm here, the stain darkened and spread, and I noticed a slow drip in the kitchen. I placed a bucket under it, but now I’m worried. Our tiled roof is over a decade old. I’ve heard small leaks can lead to serious damage if left alone. It doesn’t seem major yet, but it’s clearly getting worse. Am I overthinking it or is it time to call in a professional?