Migraines & Headaches Community

Hello all, I have suffered migraines now for several years. Beyond just the extreme pain they disable me for anywhere from 2 to 16 hours at a time. A year ago, they were almost daily and had pretty much destroyed my life. (Disability that lead to termination at my job and a continuing inability to work in my chosen field-Phone customer service, and phone use is the primary trigger these days). Late last year we found a drug that had me singing glory hallelujah, Metoprolol Succ Er, we worked up to a dosage of 100 mg tablet per day and the migraines not directly triggered by time on the phone were gone. I still couldn't do my job but I was only having about one migraine a month unless I had do spend time on the phone. My light sensitivity which had been growing on the previous medication diminished and was gone, even my depression lessened(though that was probably because we'd found a medication that worked most of the time (I never use the recuse medications maxalt, sumatripan ect, because they all cause my heart to race, had about a 50% chance of causing a panic attack and only worked on the migraine 50% of the time). About a month ago I had gotten to the point I could no longer afford the metoprolol and had to switch to atenolol which seems to continue to prevent the migraines but has come with several unpleasant side effects. I've developed an odd depression with no negative feelings- constant in my previous bouts with depression- instead just an inability to motivate myself to do anything. My light sensitivity is returning, I daily and sometimes multiple times a day bouts of vertigo and when I sleep my hands and feet are numb when I wake seemingly regardless of the position I sleep in.

So my question for the forums is this:
Has anyone suffering from severe migraines that found relief in metoprolol had success with a cheaper drug, or know of a prescription plan, be it wal mart, rite aid, walgreens or what have you that does the $10, 3 month deal on Metoprolol Succ Er?