I think I see a spot above her right eye???
Is this what you are referring too???
Sometimes no matter what we as responsible owners do, they end up with some kind of illness. I feel personally, that if they were kept in better conditions as babies we wouldn't have half the issues we do... I think being kept in TINY tanks at the pet store, and tiny tanks at the breeders, their immune system is compromised. On top of that you have to take into account the endless breeding and inbreeding that goes on... We are really trying to fight a losing battle...
Honestly, if you think that is HITH, and you are doing everything possible to treat and prevent this, She will be ok... it may take a while, but all you can do is keep her in the best conditions you can!
Just my 0.02!