Having the two together is common. Generally speaking fissures are the
much bigger evil. I feel you should hold off treatments for your hems as inserting anything up your bum should be avoided at all costs until you feel you are close to healed. I made the mistake of putting anusol suppositories up there when I first got my fissure I believe that is the reason it went on to become chronic. It's most likely that the hems will shrink if you carry on with your bathing regime and leave the area alone! Nif is ok to use on the outside, again don't try to insert your finger up there. There's nothing that sets me back more than doing something like that...or a doctor doing it
I'm surprised your doctor allowed you to use suppositories the state you seem to be in. Some of them really don't understand fissures for what they really are. They've read the medical books but that's about it. Makes me mad.