I HAVE BEEN HAVING A PAIN ON THE RIGHT SIDE

I HAVE BEEN HAVING A PAIN ON THE RIGHT SIDE IN MY BACK FOR A COUPLE OF WEEKS. IT DID NOT START UNTIL I TOOK DIFULCAN AND DR THOUGHT IS WAS A REACTION OF THE LOVASTATIN GETTING OUT OF MY SYSTEM. BUT ALONG WITH THE PAIN I HAVE BEEN CONSTIPATED ALSO. I MENTIONED THE PAIN WHICH WAS NOT BAD WHEN I WENT FOR A RECHECK AND THEY DID NOT REALLY SEEM TO THINK IT WAS A PROBLEM, BUT IM AM HAVING THE PAIN AGAIN AND STILL THE CONSTIPATION???