There's no "too late" (coming from someone who's in Madrid, Spain, which in terms of the pandemic might as well be the future).

The reality is that one or two weeks from now at most most idiots will have toilet paper for months and you'll be able to buy normally again.

Goods considered non essential, however, might be scarce since those shops will close as the workers are told to stay home. For example, I'm doing a lot of studying and I'm out of sheets of paper. Office supplies stores are closed, and buying that on Amazon feels like overkill and a little socially irresponsible, so I have to make do without them.

Check your house for random silly stuff you might miss if you're stuck at home.

When I go to the supermarkets the missing things are snack foods, beer, ice cream, etc. People have a lot of time to kill and those items arent replenished as much since they're considered non essential.