I am dizzy too
900 Calories is considered starvation level diet. I know you're still in that window, so I'd still take advantage of it and keep the calories low but make sure you're taking your vitamins, especially B-12 and iron, women need more Folic Acid too. Drink lots of water and get protein at every meal.
I would get my blood test done early to check for vitamin deficiencies.
I dont have a lot of fat left and I am still only eating around 1000 calories with 12 plus hours of workout a week. I know I need to increase my calories, but I am being causious about that as well. I saw my nut and doc two weeks ago and said I was doing fine. that I shouldnt go above 1200 cals when I am ready to maintain. I still wanted to loose 10 more pounds although I am not sure I need to.
So I am still in that window of about 1000 to 1100 calories. I did get worried the other day with the dizzy thing going on and I realized I had dropped my cals again by accident to about 800. As everyone said here I do need to increase, but I am also at goal with a good basis..
I would keep plugging along like you are doing and just keep an eye on how you are feeling.. if it doesnt stop.. you may want to speak with your doc and see what he says. Every doc is different with different philosophies. in the past it has kind of come and gone for me.. just like right now.. i am not getting dizzy like i was last week. just the way the wls crumbles I guess.
I forgot about the hypoglycemia. I used to crash in the middle of my squat workouts a few years ago and figured out if I have, like an oatmeal cookie with peanut butter, I could finish my workout without passing out. I always thought it was the healthy fats settled my stomach and digested slowly and the carbs and sugar in the cookie raised my blood sugar quickly when it would drop. I was a type II diabetic before WLS and never had those issues. I don't seem to have them now, but every once in awhile I feel a little nauseous and light headed during a workout and eating a couple of bites of a protein bar seem to snap me out of it. The last poster just reminded me of that. Earl