Freezing the cervix symptoms and conditions

OK.. I haven't seen my problem here so here goes. I had the Mirena inserted 3 months ago because of uncontrollable bleeding. My periods were so heavy I soaked the bed at night. The doctor suggested this or freezing the cervix and because the oblation was actual surgery in the hospital I chose Mirena.I am beginning to wonder if this was a mistake. The first month was great. I barely had a period (even though what I did had lasted a week) I was thrilled. I could handle that. Well, less than 3 weeks later I got it again. It would be light for 3 0r 4 days and then the floods started. Right threw my pad, pants everything.This would happen twice and it was gone. 2 1/2 weeks later I had it again. Same thing a few very light days and BAM!!! 3 weeks later it happened again which was July 3rd. I was at work and soaked threw my pants on the seat of the company car. I was so embarrassed. The weekend I was fine. Monday the 7th I went for my 3 month check (vaginal ultrasound) and told the doctor what was happening and he told me it takes 6 months to completely work and the "floods" were ok. Well I went back to work today and was fine all day. I lift heavy mail trays at work and this afternoon it happened again.Yes, on the seat of the company car. BLUCH! I am beginning to wonder if it has something to do with heavy lifting? I searched "Mirena" and "Mirena heavy lifting" and couldn't find anyone with this problem. I don't get headaches, cramps, acne or anything that I used to get since the insertion but I almost feel like I am worse now than before. I am going to talk to my Family doctor this week and see what she thinks? Any suggestions will help...Anyone go through what I have?? Thanks for listening...I am bummed this doesn't seem to be working.....