Oh meg i feel your pain!
I had an ingrwon toenail the whole time we lived in england and backpacked it was awful!

I had the side part of the nail removed right out of the bone! It doesnt grow back but the skin covers it now. It hurt for a couple of days but i have never had annother! I saw a gp who reffered me to a podiatrist!

good luck hope it gets better really quickly! x