I would ask your doctor if he or she thinks the supplements will interact with your current medications, just to be safe. I'm only taking the supplements now--I even went off birth control, because it made my anxiety worse--so I don't have experience with this regimen and medications.
The brands I use are Twinlabs Amino Fuel Lean Muscle Liquid (30 mL), Vitamin Shoppe brand magnesium citrate (200 mg twice or thrice a day, though I used to take 250 mg till they changed the mg for some reason), and Vitamin Shoppe Brand l-glutamine powder (1 tsp dissolved in water). I take the liquid, a magnesium, and the powder first thing in the morning on an empty stomach, then wait an hour before eating or drinking anything. I also take another magnesium at night right before bed, and used to take magnesium any time I felt panicky (I don't anymore--no panic attacks in over two months now!). I had the same symptoms as you too, palpitations (and tachycardia, which I have inherently but in a panic attack it was much more painful), confusion, crying...I honestly thought I would be this way till the day I died. But within one day of starting the regimen, I felt better. One month later and I was 50% improved overall, and now (about six months later) I'm 99.99% better, and only get faint "twinges"--little one-second feelings of panic--very occasionally, but personally I think that's more like PTSD/remembering the panic attacks.
If your doctor gives you the go ahead, try the regimen! It changed my life and I thank God every day (literally) for guiding me to this thread.