Congrats on the decision to get a port. My first one lasted for 13 years! It was located almost in the center of my chest...little to the right. It was a ped port as I was 11yrs old or so when it was placed. However, I am now on my 2nd. I just had it placed about 4 months ago. Here's the great thing...it's tiny...low profile...and located next to my hip bone. It's placed in the femoral vein. I am very tiny as well and did not want anything on my chest anymore. I've had central lines in my femoral vein before and asked my vascular surgeon why he couldn't put the port there. He couldn't come up with any reasons why, so then it was off to imaging. This thing is amazing. You can't see it. Nurses can always hit it with hardly any pain. I just feel a tiny pinch at the skin and it's done. Since you're tiny, it should sit nice and close to the surface which makes for easy accessing no matter where you put it.
Do all the research you can before you decide what and where it will be placed. Tons of different models exist. Since you are tiny, I would def not get a power port. We're not supposed to have blood drawn out of them because of infection, and so far they won't put contrast for imaging through a port. Those are the only reasons to have a power port in my opinion. For i.v. meds...get the smallest you can. As long as the port is anchored to your muscl really well, nurses shouldn't have any problems. Hope this gives you lots of ideas.
f/24/cf/liver disease