Pre-natals but not eating healthy.

Alright ladies, I have put a lot thought into this and have even tried Googling information on it, but I'm not getting anything.

I am taking pre-natals that have DHA as well as folic acid in them. I can't seem to eat healthy. I will be 17 weeks on Monday and I feel really bad about it. I love my chicken, rice, cereal, bagles, ect. But I can't stand salads or even most fruit. Do the pre-natals help even thought I don't eat as healthy as I should?

Is anyone else like this and didn't have any issues with their pregnancy? I'm not having issues & Baby and I are healthy.