I can relate to the hospital/pumping/drying up thing. My second child was in the PICU when he was 5 weeks old, and I was pumping at that time because I was unable to nurse. Stress can sometimes cause this.
For the second part...is this your first child? Your original weight, or your goal weight was pretty low-you actually may not ever get into the 110's again, if you are new to motherhood. Sometimes that is one of the things that just happens. I am not saying of course, that someone who was 130 and now weighs 180 after pregnancy is going to stay that weight-BUT-she might find that after a baby that the lowest she can now go is 135 or so.
Also-how is your stress level? That can be a factor. Exactly what is your exercise routine like through the week, and what is an example of your daily diet? This will give me an idea on where to tweak what you are doing.