21 years old, pregnant and on tegretol carbamezapine

hi, my name is emma, i am 21 years old and have had 2 grand mal epileptic seizures at the age of 12, and 1 at the age of 13. i got put on EPILIM which made me gain stones of weight so go changed to carbamezapine at the age of 15. A week ago i found out i was pregnant, i went to the doctors 5days ago and she told me i would be about 5-6 weeks pregnant and has prescribed me with 5mg of folic acid a day, along with my regular dose of 600mg carbamezapine per day, is this safe and could it harm me or my baby?? i have been feeling very ill since finding out an i panic very easily about the smallest of things. i havent been feeling well since finding out y news last week eg short breathnesss, very tired, sore nipples, feeling extrememely ill from morning to night but especially early morning and late nights. When night comes i do not want t do anything but lay in bed with a DVD, i feel so low and just want to cry.