skyla IUD ?!

Layla • 23|Single|
I've had my IUD for about 9 months already and just recently I've noticed I get cramping out of no where and if I have sex, I bleed afterwards is this normal or should I contact my doctor ? Could it be because I'm pregnant and I don't know, or an infection ? It doesn't smell bad down there, but I do get discomfort even if I'm not on my period 
Help !!