For goodness sakes, get another weekly pill container for the bathroom! It's not worth the risk to do otherwise and they cost very little. They cost a lot less than an extra pill you might take by mistake.
Call you doctor or your pharmacist, tell them what you suspect. I agree with the last responder that it's probably fine, just do't do it again! LOL!
There are so many different things to remember now and the pills should be the least of your worries.
Good work on the diet, too. You'll end up healthier than you've ever been!