Itching can come from irritation or anxiety. Like redness of the penis, itching rarely has any serious significance, and of course the more you think about how something itches, the more it itches. I would stay away from any more steroid use, unless you get some other rash, in which case you should show it to a dermatologist. Meantime, use an OTC anti-itch product like Sarna or Benadryl or just plain lubrication as needed. If you haven;t been evaluated for STD's, then perhaps you should be examined ands tested, just for your own peace of mind. But if the tests are negative, then you should just relax and get on with it. Itching alone doesn't suggest STD's, only fear of them.
Best.
Dr. Rockoff