Those are common symptoms taking prednisone. Some patients have very pronounced psychological side effects and others, nothing. Rapid heart rate is also common. I didn't have those problems even though on 60mg for many months and lower doses for 6 years but I know others who did have severe problems. What dose are you on and how long have you taken it? Taking sleeping pills is not a good idea. Talk to your doctor about the symptoms and see what he says in terms of dosage or an alternative treatment.
MCTD (SLE Lupus, polymyositis, scleroderma). Diagnosed 2005. Kidney, liver, GI tract, dysphagia, raynauds, barretts esophagus, quadriplegic in 2005. Recovered and now active in downhill skiing, golf, hiking. Meds: amlodipine, benezapril, omeprazole, potassium, folic acid, vitamins, maxide.
Remain Optimistic and you can overcome.