I, too, wouldbe concerned about so few calories... enough has been addressed about your doctor but you also asked for other help...
everyone has an opinion... so I am just going to tell you what has helped me and I started out around where you are....
1. eliminate pasta, rice, bread, potatoes and sugar.
2. Aim for about 1500 calories.
3. Weigh your food, measure your food and track it online with a site like
www.livestrong.com.
4. When you are hungry or have the munchies drink a Crystal Light mix-In. I use the individual packets and mix it with 16.9 ounces of water.
5. Go to the gym and get on a treadmill, elliptical or bicycle (or all three). 6 days a week and burn at least 500 calories a day. You can do!
6. Lift some weights on your big muscles... don't worry about little ones right now. If you can't get a trainer buy a Fitness magazine they usually have some good exercises to start with. Or find a book at the library.
This is how I started.