Should my period be regular after almost a year on Mirena i.u.d?

I have my son contained by july of 06 and get the iud placed within august. when i go for my string check my doc couldnt find it. she did xray and saw it but wasnt sure it was in uterus so she did ultrasound and saw somethimg but wasnt really sure. my interval have be heavier than usual but not alot and it be regular but very soon ive gotten a yeast infection and ive never have one and ive have my extent twice surrounded by 3 weeks for 5-7 days the first time. a i going to die or what. is the iud floating around somewhere it shoudnt and immediately its infected? anyone going thru this or at lowest hold mirena iud. hellp please i enjoy no insurance!
Answers:

mirena coil?

At most minuscule jump to Planned Parenthood and take checked out.