Code Review: Error logging after a given time period. How can I improve this code?

Question

I wrote a little condition to only log ("trace" in example) SQL related errors after a period of 5 minutes from the first instance. I am always looking to make code more portable and better, so I'm opening up the forum for you guys to tell me how I can do this better, or if I'm handling it well.

//we will send another SQL alert only if 5 minutes have passed since the last SQL error 
                if (logType == TraceType.EROR & ex.InnerException.Source == ".Net SqlClient Data Provider" & _SQLErrAlertSent == false)
                { 
                    Trace(logType, sTraceMsg);
                    _SQLErrAlertSent = true;
                    _SqlExTimer = DateTime.UtcNow;

                } else if (logType == TraceType.EROR & ex.InnerException.Source == ".Net SqlClient Data Provider" & _SQLErrAlertSent == true)
                {
                    
                    //we will send another SQL alert only if 5 minutes have passed since the last SQL error
                    DateTime dt = DateTime.UtcNow;
                    if ((dt - _SqlExTimer).TotalMinutes >= 5) {  
                        Trace(logType, sTraceMsg);
                       _SqlExTimer = DateTime.UtcNow;
                    }
                }
                else
                {
                    Trace(logType, sTraceMsg);
                }