I've been on the generic of Toprol XL for a month and a half. I t...

I've been on the generic of Toprol XL for a month and a half. I take 12.5 mg in the morning and 12.5 at night. I have gained 10lbs so far, I feel groggy, lightheaded, fuzzy, sleepy all the time no matter how much sleep I get. I get episodes where it feels like an elephant is sitting on my chest making it hard to get a good deap breath. I have a headache almost every day. I suffer from severe anxiety to the point that I don't like leaving my house. I worry about stupid things obsessively. I just feel crappy constantly. I was prescribed it due to a high heart rate, but I've never had high blood pressure. I have a dr's appt May 6 and I'm going to ask her to start weaning me off of it. If I would have known the side effects would be this bad I would have asked to be prescribed something else from the get go.