I have been eating 600-800 calories a day...

If you start eating at your real maintainence level now, you probably will gain a bit of weight. Your metabolism is in tatters, eating at maintainence for a time will help repair the damage. That's ok...you know what to do to take the weight off again, just don't do it the way you've done this! Eat better, eat at healthy levels. Your body deserves to be treated better.

its never too late to eat

What she said

I have the same problem, I started on this site on the 25th of July and now I feel stuffed after eating 5-700 calories. I am still losing weight though. Kinda worried that I am not eating enough.

I think for me when I was eating to low of calories, I was tired all the time and felt crappy. But as soon as I got on track, I felt better. I eat between 1200-1250 calories a day. And I've lost 28 lbs. So if you say you feel full after eating but the calories don't add to your calorie allowance, maybe eat oatmeal for breakfast, with some fresh fruit. Lunch have a grilled turkey burger with a salad and for dinner maybe some baked chicken, asparagus and a whole wheat roll. That what I did, chose items that were same in proportions, but higher in calories. But everyone is different.

Yes, up them gradually. Add 100-200 every week or so.

Add some healthy oils...coconut or olive oil. Very calorie dense, but GOOD FOR you. Maybe you want to consider increasing your calorie intake every other day. Not quite as scary as jumping in with both feet. Regardless, you must eat more eventually. Be wise about it and don't let fear and worry take over.

should i slowly work up to my goal??? also how can i tell im in starvation mode?? i am wondering if I should eat something just to boost my calories now..?? (its 10:37 pm though is it maybe too late to eat)??

You said you've been hovering around 6-800, with occasional bouts of the low 1000s, so yeah, add like 100-150 or so per week.

Significant metabolic slowdown can be broadly checked by figuring out your maintenance (let's call it m)then averaging out your daily intake (f for food) for as long as you have data for. If m-f is positive, you're theoretically at a deficit (d). Now, however many days you had data for f, let's call it t, multiply by your deficit, then divide by 3500 (amount of total deficit required to lose 1 lb) so (td)/3500= expected weight loss. Now compare to actual weight lost over t. about 10% variation from this is expected given differing metabolisms. 15% wouldn't be horrible, since metabolisms slow down to some extent during a diet. If you've lost I'd say half of what you should have (ex. your expected lose was 30, and you've lost 15 or less), you might have messed something up. Of course, 50% is just a guess, others might have a different take on the threshold, but it seems significant enough to me to not be explainable by simple variance in individual metabolic rates.

so again; m-f=d, then (dt)/3500= expected loss. If actual loss is <= 50% of expected loss, you may have done some damage to your metabolism. Oh well, humans are adaptable, eat at maintenance for a bit and it should sort itself out.

I think they were directing the breakfast thing at me. I am on disability and have serious trouble sleeping, I just don't get out of bed until 11-12pm. I struggle with chronic pain and I am finally trying to drop some weight as my MD's have asked that I do.