My Doctor Said ... She Is Not Clearly Visible My

My doctor said ... She is not clearly visible my Fallopian tubes in x Ray photo..(HSG test is done by another gynac and she tell that everything is normal..)so she is suggesting me for operation to see Fallopian tubes...I just wanted to know..is operation is the only option for that ..and if I operate then after operation.. how long period of time I can take chance to became pregnant??I can't understand..what to do.. please I want your opoinion..