Terrible Racing Heart and Shortness of Breath

First my doctor started me on lamictal at 200mg crazy high beginning dose. That was not a good day. I felt something was wrong with that dosage so I called the pharmacist they started me on 50mg I have been on it for 4 days. Yes only 4 days and my heart feels like it is going to explode out of my chest and I cant breath I am weak and my appetite is ridiculusly increasing. I feel just awful and cloudy in my head. I am taking this for bipolar but I seem to be manic majority of the time. I get depressive days but they dont last too long. They gave me kolonopin which I do not like to take alot because I have 3 small children I need to be ok for. So a medicine that makes me not able to function properly is not acceptable. I am convinced this lamictal is the cause and I am going to stop taking it. I dont think I will have a problem after 4 days coming off of it I hope not anyways. I would rather have my up and downs then feel like this. Hopefully when I go to the doctor on the 15th their is something else I can try.