Confused on the Calorie Goal

I am a thyroid cancer survior and I am fighting the weight everyday. Back in 2010 got down to 184 and now I am back up to 228 due to medicines for my auto-immune disease. My doctor told me she wants me to workout for at least 45 min five days a week and that I was not eating enough calories. Last week was my first day back at the gym and I only went three days and walked the track for 30min each time. This week I have for three mornings got up early and did my walk at home dvd for 1 mile then gym at night for 30-45 min. and tried to stay between 1200-1350 calories for some reason I always go over the protein amount each day, is this bad? I weighed today and I had not lost one pound not even a half of a pound. So this next week I am going to try 1400 calories a day and see if this helps. Does anyone have any suggestions if I am still getting too many calories or not enough calories any help is greatly appreciated. I have my coffee in the morning and then I drink plenty of water...no soda sometimes unsweetned tea with dinner. thank you for taking the time to read my post......I am on the road to success I just know it.....