Methylpred DP and racing heart

I've now taken three 4mg tabs, and last night I had a cramp in my cramp and jumped out of bed. In addition, I sometimes suffer from arethmya (racing heart), and today I've already had 2 episodes of that, where normally it might happen to me once every 6 weeks. Is it possible this medication is causing that?

This is the second time I've had to take the Methylpred pack for six days. The first time was a year ago to relieve the swelling and pain from a broken foot. The only side affect I experienced at that time was extreme euphoria, then I went to the opposite extreme and wanted to sleep.

This time I'm taking the pack for arthritis in the same foot. I had to take 6 tablets in a period of 4 hours because I got it so late in the day. I had a horrible headache all night. Do NOT take this med with Naproxin (Aleve). I had the worst shakes I've ever had, racing heart and could not sleep. I checked with the pharmicist today and he said to take tylenol. I'm also experiencing the extreme mood changes, burning eyes, flushed face, and constipation. However, the pain and swelling in my foot has been aleviated. I'm not sure the side affects have been worth it though. There has to be a more natural way to treat this than by a medicine that causes this many side affects.