Had forgotten, if I knew, that you had a high ammonia situation. That can indeed lead to a long setback due to the wrong bacterial species clogging up the media with its biofilms we think. I would not go overboard restarting everything however, its likely the right species will be along in a bit. If you feel inspired on a weekend you could consider doing a full gravel-clean-water-change, a very light squeeze-out or swish of the media in tank water and then a refill (dechlor and rough temp matching of course) and then a recharge of the ammonia and the baking soda. This will constitute a "reset" without losing what correct bacteria there might be already there in the biomedia. Then of course be sure your temp gets back up to 29C/84F and monitor your baking soda such that you ease the pH up to 8.0 to 8.4 range hopefully.
~~waterdrop~~