I've used several calorie calculators and most say I should be consuming around 1200 calories / day. I am pretty sedentary aside my little work outs. I have occasional days of lots of activity, but they are usually limited to one day on the weekend (this will pick up for me as the weather changes). I recently had surgery and my work outs a somewhat restricted. I do 15-20 minutes on the elliptical 2-3x per week and 20 minute Weight Loss Yoga 2x per week.

On days that I work out, I'm eating back at least some of the calories from them. I am NOT relying on MFP's calories burned (I use two online calculators that seem much more realistic for the amount burned during a work out).

I HAVE been losing weight. Actually, I've lost 17#'s since Febuary 1st.
Start weight 2-1 : 197#
Weight today 3-17 : 180#
I'm 5'5"

So what's wrong? I feel like crud. I'll be going about my day fine and then WHAM I feel like I'm going to pass out. Sometimes snacks help - but sometimes it's not until a meal time that it eases up. I'm also functioning every single day with a mild headache. Initially I thought this was from going off of soda (caffeine) but we're at over 6 weeks now (and I still have one soda a day) so this shouldn't be causing the head aches still. I was normally pretty high energy, taking care of the house, pets, staying up late, etc. and now I just want to go to bed. I am DRASTICALLY more tired than I was before starting and I get a solid 8-10 hours of sleep a night. ALWAYS.

Any thoughts ? (my diary is open to friends)

First way to loose the weight. I hope that you are feeling better. I am not a fitness expert but I love to workout and I am involved in sports were weight is closely tracked. I personally think that 1,200 cal a day is not enough to live on. I think that you should increase your calorie intake but also really commit to working out for at least an hour and a half three to four times a week.

lol i eat around 1700-1800 to lose weight if i stay sedentary and dont workout the whole day

im 5'4 and 148 lbs
you need to eat way more or u are going to start losing muscle mass