Could I be??

This might sound silly but just let me know what you think... I got the paraguard iud about 3 weeks ago and I've been taking my birth control (really irregularily and late but still). My bf has been finishing in me ever since after a week of having the iud. I bled and cramped everyday up 3 days ago... My boobs hurt and my period is due but hasn't come. Is there any way I might be pregnant?