Hi... The bleeding you have had could have been due to the hormonal disturbances following the removal of the IUD.. However, pregnancy is still a possibility.. The best way to know what the cause could be is by getting the test done.. Since it is too early for a urine pregnancy test, you can either wait for 4 weeks and then get those tests or alternatively a transvaginal ultrasound may be tried after 2 weeks to check for pregnancy.. A pap smear should also be a useful tool in the present scenario... This is only for your information and the opinion can change after an examination by a doctor...