I took Yogi out for his daily walk this morning. As we were walking he suddenly stopped and his front right paw was up. I quickly picked him up to check what was wrong and he had a red ant. A red ant bit him. I had to carry him all the way home because he couldn't put pressure on that paw. I called the vet and asked if it was necessary to bring him in, but they said to just keep an eye out on it. He still isn't putting any pressure on it and it keeps on shaking. I feel so bad for him. Have any of you had anything like this happen to their baby. Is there anything I can do or put on it to make him feel better?

I hate seeing my baby like this.
Any suggestions will be greatly appreciated.