yes, I'm pregnant

Congratulations!
First of all, you should just eat healthy, regular, and varied meals.
Eat plenty of fruits and vegetables, and make sure you drink enough water.
Having fries once in a while is not a big deal at all.
Just be careful not to eat for two; that's completely unnecessary.

When you search on Google, you'll find quite a few lists with what you can and can't eat.

Congratulations! How exciting! Well, girl, let me tell you, during the first few weeks of my pregnancy I also ate very neatly and drank fruit juice, but soon I started feeling like "mwa.." hihi. I preferred vegetables with potatoes and some meat, or a casserole, but I also went out to eat quite often and sometimes enjoyed a chip or a piece of chocolate. I have to say that I'm not really into salads, fruit, and all that. My baby is super healthy and was born weighing 4.5kg #ouch Ps this isn't because of my eating habits though (maybe..?) I'm tall and big myself.

Normally, just keep eating and don't go on a diet.
No red meat and be careful with certain types of fish.
Make sure eggs are well-cooked or boiled.
Two pieces of fruit per day and 2 to 3 dairy products per day.
Be careful with soda; it's better to drink water or green tea. I find Crystal Clear quite nice.

I take extra vitamins, but this isn't necessary of course. It just makes me feel better since I'm not much of a fish eater.

And otherwise, if you're in the mood for fries or pizza, just eat it!