Ouchie, since you are nursing your baby, you need to be careful with the AF medications.
They don't seem to know if nitro is secreted into breast milk (which seems odd - maybe I missed something)
Diltiazem will be secreted into the breast milk, but they don't know if that can harm your baby.
http://www.drugs.com/pregnancy/diltiazem.htmlNifedipine seems safe:
http://www.drugs.com/breastfeeding/nifedipine.htmlYou need to check with your doctor.
I totally understand that you can't spend a lot of time in baths. Jeez Louise, when I was nursing, I would've killed for a lovely long bath. I recommend a hot water bottle. It really does ease the pain, and can also help with healing, since it increases blood supply to the anus and can relax the anal sphincter. Those are the same effects the drugs have. Make the bottle very warm, not hot and sit on it as much as you can. You can also lie down on your back with the bottle under your bum, or lie on your side with the bottle leaning against your bum.
So, you can sit on the bottle while you are nursing. If sitting hurts, are you able to nurse lying down? If you can do that, it's a very blissful, peaceful way to nurse. Breastfeeding takes a lot of water, as I'm sure you know, so you may have to drink even more than most of us fissure fighters. Though 4 litres sounds as though it should be enough!
Can you get your OB/gyn in on this? Or your paediatrician? After all, as a new mother, you are already somewhat at risk for post partum depression, and now you have to deal with the fissure. I think somebody should be working with you on the depression, the weight loss, and of course the fissure itself. Can you enlist your husband to try and get somebody to take this seriously? You need help and advice, and you are not getting it.
I promise you, things will get easier. Fissures are horrible but they can be cured. Please try again or get your husband to try to get help with depression and weight loss.
My thoughts are with you!