Hi Littlebutterfly,
I agree with Anonymon totally on this.
It's not a direct cause but can contribute majorly to the physical circumstances and the sitution that arises because of stress that impacts on your digestive system.....
Mental stress leads you to feeling so depressed and low about it all, that it's hard to remain positive with the determination to fight the thing. I so believe in that mind-body connection and the fact that a positive mindset greatly assists in dealing the issue.
I am certain that stress probably played a major role in the onset of my fissure - I was going through a relocation just before the fissure erupted, pressures of sorting out a new school for my daughter, the stress of finding a new job and adjusting to totally new surroundings. I am certain my dietary standards dropped because we were eating more convenience and fast foods at that time whilst trying to do a multitude of other stuff associated with moving. My body clock was out of sync, my eating habits changed and bang two months later, the fissure....Now I've calmed down and settled, I have a chronic fissure but dealing OK with it now I am able to plan proper meals, tackle my mental stress issues etc......
I appreciate totally you are dealing with an extremely tough and distressing situation but please ensure you take time out to look after yourself too and hopefully you have close friends and other support that you too can turn to, to release your own frustrations and stress.