Please check in with your doctor and review where you are now. It's important to get a handle on the dizziness you are experiencing. Also, there are resources on Sparkpeople to check out info on calories etc. It seems that if a person cuts calories too much, the body is programmed to slow down metabolism, so, maybe you need more than 1200 calories a day at 325 pounds. This is more of a journey not so much a sprint. Check out the Slowest Loser Spark Team. Remember to enjoy the journey.