Occasional problems symptoms and conditions

I have been on Lamictal for approximately 7 years. The product initially seemed to work a bit on controlling my seizure activity, and did provide a bit more confidence in social situations. At this point I was taking 400mg per day, and had little side effects other than the absent mindedness, and occasional problems with vertigo.
Briefly, about a year ago, I began having an increasing number of partial and general seizures, and was brought up to a dosage of 700mg per day. It was at this point that I began noticing what could only be called "hard-core" side effects. These included days where I was just totally confused, paranoid, suicidal, having an unrelenting feeling of not being able to breath, feeling bloated in my abdomen, and regularly being struck with a very irregular, very scary, rapid heart beat.
At this point, I am taking 600mg per day, and am still having most of these side-effects, but in decreased frequency. My neurologist never mentioned any of these possible symptoms, and doesn't seem overly concerned about any of the problems that I have mentioned in the past. With this in mind, it is somewhat relieving to see that there are others out there who are noticing similar effects.
If anyone can explain the difficulty breathing thing a bit more, it might help me wrap my brain (no pun intended) around this whole mess. I'm not sure if it's related to a decrease in blood pressure - I've been monitoring mine and haven't seen any irregularities. Or if it's related to a decrease in the amount of oxygen in the circulatory system due to the drug itself, or as a side-effect of the shallow breathing I have read about in other posts here.

This was my husband's experience, not mine. He started Lisinopril in October of 2007. After one month he started having anxiety/panic attacks, started having trouble concentrating on reading (which he loved), his memory was shot, he didn't sleep well, he lost his sense of humor. After two months, in one week's time, he spiraled into such a deep depression that he ended up taking his own life. I'm convinced it was because of the combination of Lisinopril, diuretic and Statin he was taking. He was a different person after adding Lisinopril and Simvastatin to his diuretic medication.

Skipped heart beats, fast resting heart beat and moderately elevated BP generated a prescription for yours truly about two years ago. I take 12.5 mg dose of toprol every morning and it has generally fixed the problem. I still get occasional skipped beats and sometimes the heart is beating faster and harder than I think is called for but by and large I am much better off since I started taking toprol. I have gained weight. I do have occasional problems sleeping. My libido seems to arrive swell enough (no pun intended) when the occasion permits it. I also take 10mg Lipotor, 81mg aspirin and 500 mg metformin daily.