Questions about poison ivy?

Ok so my first question is, Can poison ivy spread to other areas of the body? I read online that it can't and when u think it's "spreading" it's actually a delayed reaction of the oils on your skin.

Second question: Is it possible to put calamine lotion on your poison ivy rash too often? The bottle says to use it only 3-4 times a day, but it's the only thing that can stop me from itching so much so i've been using it like 6 or 7 times a day.

Third question is, What other things can i do to stop the itchy-ness? I've tried calamine lotion and ice packs. The ice pack doesn't help much and i think i'm using the calamine way too often.

Last Question: Will an oatmeal bath help sooth the rash? I read on a couple sites that it would, but the box says its to help moisturize your skin and don't i want to dry out the rash?

So it started Monday or Tuesday and I have a lot of spots all over my legs and my side. I have a big rash on the back of my knee that's kinda scabbing and i think it might be infected, and another large spot is on my side and it's basically from the bottom of my ribs to just below my pants line. I am trying really hard not to scratch but there are so many spots its hard to keep myself form doing it, especially while i'm sleeping.

Any help would be awesome!