first of all, i'm so sorry to hear of how you developed the fissure. you're a strong person for coping with the psychological effects of an assault, not to mention the subsequent pain you're in.
Baths, fiber, water (lots), exercise, nitroglycerin ointment should be enough to do the job, right?
No. unfortunately this is not enough for most people. especially after having a fissure for several months like you have. all of those things are helpful but will most likely not solve the problem. before you give up all hope consider trying one of the many options (ie botox, nifedipine, diltiazem, LIS, fissurectomy, or just using softening laxatives like miralax or Milk of magnesia).
in addition, a daily combo of benefiber and miralax has helped so many people on this board and others. try adding a full dose of miralax every night to get your stool to the right consistency. also try eating smaller meals, less meat & dairy, and extra fruits and vegetables.
if you are truly thinking about suicide, please see a dr for antidepressants. i was at that point for quite awhile after my 3rd anal surgery and wellbutrin has helped pull me out of that hole of despair. it's not worth ending your life over. i'm still not better but i have a lot more hope now than i did before.
i hate to say it but you're probably in for a lot of ups and downs over the next few months and/or years. once you have a problem like this it tends to stick around....or come back in your life once you think it's gone. you need to find a routine that works for you and your butt and stick with it as long as possible, even after you think you're better.
good luck.