This might sound harsh, but I think you should seriously consider your dad's advice. Your marriage is very short to have experienced this so many times, including even before your marriage even began (unless I'm missing something and you and your H dated for many years prior or something). I don't know if the problem is you or your R at all. It might be one of those situations where it is totally him. If you want to start a family soon, do you want to spend 2 years or more fixing this with a serial walk-away husband who may not be able to handle the added stress of a child once the child arrives? I don't know. Only you can guess. But I would think long and hard about what your dad has to say while you are DBing. See what would be best for you and try to figure out if you can even handle the timeline for fixing such things. Your H may not be able to fix this quickly in IC. Sorry if this sounds harsh. I am just pointing out another possible view to consider over the next six months as you make your decision. I think IC would be useful for you alone to sort out what is best for you, not just the R.
