Need advice on Cryotheraphy. My periods?

Hi...I am currently 6 months postpartum...I had subchorionic hemorrhage and a cerclage during pregnancy and stitch was infected and I had premature delivery...I had bleeding for 62 days after delivery and given depo provera shot... bleeding recurred again in 42 days then I was given "Smartinor and "ovral" for 2 months to stabilize periods which didn't work...I have excessive pale yellow watery discharge at times with no smell or itching which last for hours and stops randomly, not continuous...I visited gynecologist nearby who examined and advised few tests and antibiotics...USG abdomen is normal...Urine culture shows no infection...Pap Smear tells " Inflammatory cervix with reactive changes, no infection, no sign of malignancy"...My doctor has suggested Cryotheraphy...My doubt is do I really need Cryotheraphy or cervix inflammation will subside at some point in time? Is excessive yellow discharge because of harmonal pill or inflammed cervix? What should be done to regulate my periods?