I Had A Total Knee Replacement On October 6th And

I had a total knee replacement on October 6th and have been on Oxycodone 325 mg. after about 31/2 weeks I tapered off and found myself in a withdrawal situation. I am trying to wean myself off of the drug. I am so constipated ... I have been doing a glycerine suppository ever few days .... I'm taking ducolax and Mirolax but me today I stuck my finger up y rectum and I am bleeding. I'm so scared