You just have to get over your paranoia. Paranoia, will destroy ya! In time with experience on your side you will begin to be able to tell the differences between a healthy and unhealthy frog. In the meantime, there are herp societies and vets you can get help from. I strongly recommend that everyone reading this join a herp society. There you find like-minded people, a lot of which will have the experience to help you out and give you advice. Plus they can actually look at your animal and tell whether or not it needs to see the vet.