Hey there,
the shards of glass is the worst! It mentally takes a toll on you having a fissure and the fear it puts in you can't be understood by anyone who hasn't been through it!
The one thing that really helped me with the shards of glass feeling was figuring out what not to eat! Anything sharp like chips, nuts, etc...would tare me apart. The miralax definitely produces a softer, easier to pass stool.
I take the full cap(17g's) once a day. You can probably start with the same amount and then adjust according to the results you get. Many people on this board adjust their dose as needed.
The baths really helped me in the beginning. I kept them warm through out the whole soak by adding more hot water when it would cool. Take as many as you can and stay in for at least 20 minutes at a time. You can air dry or blow dry your bum before applying your nitro.
Don't let what you read on the internet freak you out! That's what kept me from getting LIS for so long. All the horror stories
Just remember when you start to get good results and things are feeling better, don't stop your regimen. It takes awhile to completely heal your fissure and if by some chance it doesn't happen, don't be afraid of LIS. It is nothing compared to the surgery you've already had. God Bless, take care!
Dawn