Shannon:
1. The answer to that is different for everyone. Some people have counts that stay up for a while and some people drop right away. No set answer.
2. Chronic is defined as having ITP for 6 to 12 months. I personally feel that 6 months is not long enough to be labeled chronic. As for how long and how many treatments you should try before considering splenectomy, I never thought of it like that. In my case, I was willing to just keep going with treatments until I was tired of the whole thing. I did end up with remission before I was about ready to throw in the towel (about five years of ups and downs). I was always glad I didn't give in, knowing what I know now.
I would not say you are grasping at straws. Not at all. Everything you are doing is reasonable and common. I do not believe that splenectomy is the one and only true fix and if you don't do that, you are wrong or hurting yourself in some way. It's okay to try all available options if you want to.