I Took Crestor For 2 Months 40 Mg Once A

I took Crestor for 2 months 40 mg once a day. Last month I had a diet eating one time a day only salad with no meat. I lost 14 pounds. My cholesterol dropped from 127 to 88. But the bad thing was my HDL dropped from 55 to 40. Before I was using Semivastatin, but my doctor changed semivastatin to Rosuvastatin. Do you think the drop of my HDL is because of this change? Thank you