What sort of weed killer, including a weed-and-feed product, has been used in the vicinity?

ortho max, last month, applied to the yard with a small tank sprayer. I was pretty carefull not to spray on the garden.

The garden is in a 15" tall box above ground level.

As it turns out, herbicides can drift for miles. So to a nearby raised bed/container is an easy leap.

Just how far, and just where the herbicide droplets and/or vapors land depends upon multiple factors, among them prevailing atmospheric conditions, the product applied, the temperature during & following application, and the method of application, and the turbulence of the spray

Then, too the sensitivity of the plants, and the dose received, determines the outcome.

Well, that won't happen again.

Is there anything I can do now? Is it just a matter of time for it to wear off?

Time.

I've seen seedlings wilt from being placed in a box that was used to ship 2,4-D or Glysophate. Not actual contact with the plants, just the fumes that have seeped through the bottles.