Numb lips, hands and arms

I was just wondering if anyone has any advice. I recently switched medical providers and have been on a new perscription of Levothyroxine, but different manufacturers. I am about 35, 5'2 weigh about 150 lbs, I went on a low calorie diet 950 calories a day, I work out and lift weight 4-5 times a week, and I am a size 6. This new doctor is always trying to refer me to weight management classes and healthy eating, despite the fact that I have told her I eat very healthy, run as well as work out quite a bit. I have recently been having this tingling sensation and feelng of numbness around my lips, my arms feel weak and tingly as well as my eyes feel foggy. I call the doctors and ask them but the first thing they ask me if if I received the information about the weight management classes. I polietly say I am not interested and ask about my meds and tell of the symptoms but I am told not to worry. I am beginning to get a little brain foggy and I just want to cry at every little thing. Could this be my meds or somehow related to my thyroid or lack of? I had thyroid cancer about 2 years ago, a total thyroid removal as well as iodine radiatin that kept me in the hospital for 4 days. Could it be my calcium even though it has been a while since surgrey and post op calcium levels were fine? I'm just getting a little frustrated! Tired of feeling like crap! Please someone tell me its not my weight as my doctor seem to be hinting to me.