Context: I was tightening my passengers side rear and front wheel because the car kept shaking a bit on the highway and I already balanced the rear wheel since it was new, so i figured the lugnuts weren't tightened properly because I changed the brake pads myself a couple days after the balancing. This was the last nut to be tightened and while i was putting my weight on it (i don't own an impact wrench), it came off. I drove it around my neighborhood to feel how the car drives and the shaking is not noticeable anymore, but im still scared of driving on the highway with a missing nut. Please advise, is this something i shouldn't bother with or does it need repairs?
Edit: Thanks for the responses, they are greatly appreciated. Something i forgot to mention was that I do plan on replacing the car in a couple of months, so I don't really want to spend more money than I need to on it. I did search up the part and its about 10 bucks more or less, and the only annoying part would be taking off the calipers and rotors, but since I already change my own brakes its not that much of an issue.
2010 Toyota Camry LE
376,000km
Automatic transmission