Metoprolol Succinate ER and constant headaches

I've had a problem of chronic stress for the past few years. During the past 10 months, I've made 7 visits to the ER because I felt symptoms of a heart atack. Each time I went in, it was EKG, ultrasound, cat scan or IMR, blood workup, oxygen, stress test, etc. I was in the ICU once, for 24 hours. Each time, the results were negative. This past visit (1 month ago), they detected an arrhythmia. This prompted the ER doc to prescribe the drug Metoprolol Succinate ER 25 mg tabs. I am to take it for 3 weeks, then see my GP. Since returning, the heart beat is irregular and somewhat harder than before. It's uncomfortable laying down in bed so I sleep in the living room, sitting up. In addition, I'm taking anticonvulsants (Keppra and Lamictal) and food supplements. I'm due to go in a week and this really has me concerned. I'm wondering if everything is working against each other. I signed medical releases with all four of my doctors but they don't communicate as I had asked them to. The side effects are: constant headaches, ringing in the ears, hallucinations, mental confusion, bipolar/depression, joint pain, weakness in muscles, spasms, panic attacks, increased stress, vision problems, plus thoughts about high medical bills. Any thoughts about this? I don't expect you to respond to this but my email address is:****** Thanks for considering what I've shared with all of you.
Well, I've been having