I don't know if you need to be checked or not but if the itching went away and you don't feel like you've done anything that warranted being checked by a doctor you shouldn't be too concerned about temporary itching.
I think u should get checked out have ur doctor to give u pap smear. Because some soaps can cause vaginal itching. And also you can a slight yeast infection and dont know it. To be on the safe side u should get checked out even if ur not itching anymore. 8)