Pregnant need advice!

Hi guys, I won’t be able to visit the doctor for my first time until Monday. I found out I’m pregnant yesterday. A bunch of comments said I’m 1000% pregnant. I haven’t tested again. But I’ve kinda accepted the fact that I’m pregnant. Missed period but normally I miss and it’s normal for me then I’ll have a period like 3x one month.

Anyway I guess what I’m trying to say is, until Monday, what all do I need to know about pregnancy. What new eating habits do I need to develop???

What’s healthy and unhealthy for me? Medicine wise, food wise, exercise wise, ect. Just the basic knowledge for now.

I’m 18, living with bf of 2 years, haven’t told mom and dad yet. Trying to handle this beginning part on my own. May be 4 weeks? Been a while since my last period. Over a month even