I have my tubes tied and just got an IUD to aleviate symptoms of menorriah. I have been spotting, bleeding and passing clots since I got the IUD 2 weeks ago. Is this normal?

Not really . Bleeding the first 1-6 weeks after Mirena (levonorgestrel) is common but it should not be heavy with clots. Maybe an endometrial ablation would be a better option if this does not work in the next few cycles.
Possibly. The heavy bleeding and clotting may not be controlled for approximately 4 to 6 weeks thus allowing the iud hormones to start working.