Hey Mikey, you sound like a pretty decent guy, so I really hope everything turns out for the better. I gpt prego shortly after my 18th. I know thats not quite as young as you and your gf, but I can still relate. I can't really give you advice, since you know your parents alot better than any of us, but I can tell you that it will probably be really hard in the beginning, but it WILL get better and easier with time! Also most of the ppl on here are from Canada and the U.S so you'll have to find someone from the Wales or sumtin to help you out on the legal part of your question
Have you and your GF decided if you want to keep it or not yet?
GOOD LUCK!