I wish I could do better.

So I was diagnosed with HG about week 5, it was really bad. It subsided around week 13. I still can't take any vitamins or I get sick, I can only eat fast food such as mc Donald's fries, I can eat spaghetti, Taco Bell pizza and grilled cheese sammies. 
Has anyone else done this ? I just feel like my baby is going to be really unhealthy but I can't keep anything else down. Food still makes me so sick. 
Just feeling like I fucked up really bad already. I'm afraid when the baby is older then won't like anything but fast food and I don't plan on him having it until he's like way older.