Smallkisses,
I was horribly anxious and scared to even think about changing the way I eat and the way I exercise - and still am, sometimes! One thing I highly recommend is make yourself a list of goals. Start from the smallest thing you can think of - one of mine was that I wanted to make dinner for myself at least 5 out of 7 nights a week, and to pack my lunch every day. Then up to my biggest
goal - to be a size 12 or 10 wedding dress by my wedding in May of '09. Writing all of those out was scary, but at the same time it helped me to kinda sort things out and start to do them a little bit at a time. It was the not rushing that helped me get over my anxiety.
Not everyone is able to do this, but I highly recommend seeing a nutritionist and/or a therapist. It's super important to be able to connect your emotional status to your physical status, and it's always nice to have someone who is in your corner supporting you!! (ie. therapist)
Make a diary, too! It's helpful because you are really able to get out your feelings surrounding food and your decision to make a healthy change.
It's not going to be overnight. It's a process. And it's one that needs a lot of self-love to back it up. You can do it! And there are tons of people around who are more than willing to help you.