Lamictal and gradually

I'm having serious side effects currently. The onset of the side effects began after taking Lamictal for over 2 months. I started slowly on 25 mg and gradually increased to 200. I felt a great improvement in Bipolar disorder-mood swings- at 100mg but was told that is not the theraputic dose, so we increased to 200mg.

I had no side effects until the rash began to appear. At first only on legs, then arms, then neck, then face...and surprisingly in private areas. Unbearable itching. Rash continued to rage even after a pack of steroids. Swelling became apparrent in face and entire body. Slight difficulty breathing. Went to the ER and received another dose of steroids intravenously. The rash continues to improve but is still extremely itch. The swelling improved for a couple of days but is back. Had one day of severe headache. It has been 14 days and today I am experiencing blurred vision in the left eye, and new swelling in the tongue.
I sit at home with an Epi Pen next to me waiting to hear back from the doctor.

All of this is so unfortunate because I felt more stable than I have in years while on the medication. I'm feeling very concerned about my continuing side effects. Don't know what to expect.

I have been prescribed Lamictal for seizures, and am currently taking 400mg daily, with my 300mg of Dilantin. Had horrible side effects this weekend-nightmares, exhausted, worsening depression, crying jags, difficulty swallowing. Has anyone else experienced mood changes for the worse while on this drug?