Zocor and panic attacks

My doctor & I agreed I should go on Simvastatin 10mgm for a slightly high cholesterol approx March 2nd. My already tenuous sleep problems became more so immediately. Medication for sleep was ineffective.
After 3 weeks of Simvastatin I started dozing off & waking with sort of panic attacks-weird dreams & my heart fluttering.-several times during the night.
During the daytime when checking –occasionally my blood pressure would drop to below 100 systolic over 40 & my pulse dropped to 38-40/per min. The pulse was regular like a ventricular rhythm (when the atria of the heart is no longer the electrical pacer) This drop would persist for approximately a half hour & occur several times during the day. There were no other symptoms associated that I could discern.
I could find no side effects listed online or from the pharmacist like these for Simvastatin. Concerned, I stopped taking the Simvastatin 11 days ago. Three days ago I felt good, found no BP or Pulse problems & have had good sleep. Since this has continued I am feeling certain that I reacted in some way to the Simvastatin