It's a mild cream, the one I wrote about, 1 %
Hydrocortisone is OK to use. We're all inviduals. I'd say 1 month is pretty safe, but I'm no doctor. Listen to your body! I use it from time to time for different causes, like insect bites etc., even though I have other creams and lotions and oils and and ... so much stuff to use.
All the best to you! If you're OK with what you have, don't stress about it!