Hey Jal,
a fever doesn't sound good. I'm not sure that a couple of days would make a difference. You could go to the hospital if things get worse though.
I had a fissure for 8 months and about lost my mind! Coping is the hardest part....
But YES, you need to go to the potty everyday with a fissure. Are you taking a stool softener? Miralax works really well for most people and makes bathroom time a little easier. Just don't hold your bowel movements! You don't want the bm's to get harder or cause constipation!!
Try to get a fair amount of fiber from fruits and vegetables and drink plenty of water. Some people take fiber supplements like metamucil or benefiber. It made my bm's too bulky and hurt worse, so I just ate 20-25 g's of fiber a day. You kind of have to experiment and see what works best for you since we are all different. But be sure and drink plenty of water when increasing fiber or you could get constipated...I drink a gallon a day for example. That may be over board but I suggest you drink until your pee looks like culligan came( clear).