Sorry your little one had to go through all that. Luckly my 19 month old did not have to have all those medical tests but he still is "constantly jabbing her (his) fingers into our ears, eyes, mouths, and hitting, biting, and pinching". I think it might just be a developmental stage. He has gotten better. It's more like "oh yah, I know what those are now." We are still working on the hitting and bitting only happens when his is kissing me and gets over excited.