I upped my calories to about 1200 for a sedentary day
Um .. you "upped" your calories to 1200? What were you eating before? Oh, wait, I see .. 1000 calories.
Even before yo uposted this info, I was about to say sounds like a massive mineral deficiency combined with dehydration, but now I'm sure of it.
Sweetie, at 200 lbs, below 1000 calories is dangerously low for you. At 200 lbs I'd say even 1500 calories would be skimming the edge of too little. At 200 lbs, I was eating around 1800 calories and continuing to lose weight. I didn't drop to 1500 calories, until I got down into the 170s.
And on top of that you're shoveling snow and running around w/out eating anything all day in the freezing cold (which makes your body work overtime)?
And let me add this warning - I mean this very seriously. Your heart is a muscle that relies on minerals and especially potassium to function properly. When you under-nourish yourself and deprive your muscles of potassium, you are not only damaging your long muscles, you are damaging your heart.
I'm gonna say it again ... really loudly EAT MORE FOOD and eat it regularly.
You don't have time to eat? Do you have time to lie in bed with cramps, dehydration, and congestive heart failure because you starved yourself?
It takes 2 minutes to slap some peanut butter on a slice of bread, fold it over and eat it.
It takes 2 minutes to eat an apple.
It takes 12 minutes to boil a couple of eggs and throw them in your purse when you're on the go.
****, if you're in that much of a time bind, it takes 2 minutes and $2.49 to grab a Clif bar at the grocery store.
EAT. Eat eat eat eat eat.