Tamara, you will heal in the end and what seems like a long time now is not in a lifetime. When having this fissure we sometimes have to lean back and see that things could have been so much worse. I am not trying to make your problem smaller than it is, because I know only too well how painful, depressing and uncomfortable this is, but this isn't lethal - we will be able to see our children grow up....
Also remember that when you are a new mum you are hormonal and that may affect how your feel.
Sorry you have lost so much weight, I have too and I have seen a nutritionist because of it, and she recommended a nutrition drink for me. I take one each day together with a smoothie. I guess you fear large/formed BM too? I eat liquid food the first 2 meals every day because I cannot have too hard BM the next morning.
Ask in your local pharmacy about the nutridrink, I take this one with fibre:
http://www.nutricia.no/Produkter/N%C3%A6ringsdrikker/Fullverdig+ern%C3%A6ring/Nutridrink+Multi+Fibre/Nutridrink+Multi+Fibre.htmThis page is in Norwegian, but you can find it on English as well...I guess the selection of nutridrinks are much better in Canada where you live... :)
I think it is so good that you have "a plan" and are persistent about this, and that you and your husband it together in this. Don't give up Tamara, you will heal in the end...try not to worry and enjoy the small things that are good in your life...and your baby
Corsica