Pregnancy! Please help

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Hi! I have some questions, Iv taken a pregnancy test this morning and to my surprise I got a positive (in shock) glow says I'm about 5 weeks! But I'm concerned! I was drinking yesterday while out at a meal and now I'm petrified it's caused problems, I even ate medium steak! Which according to the Internet is not good either! 
I live in the UK (will be 24 years old soon) my boyfriend and I live in separate houses so we are definitely in need of planning the future. He's the only one with a job and it's part time (he's looking for a full time job) I have anxiety also, pretty severe so worried about that also. 
My question is what do I need to do next? I'm sooo scared right now, only because giving birth scares me but I'm fully comitted and so is my boyfriend. We wanted babies in the future anyway so that's good but just happening a bit earlyier than expected. 
Thank you for any advice!