Kyleena iud

I got my kyleena iud at the end of February and have been bleeding off and on ever since. Sometimes I will stop bleeding and then I’ll have sex and start bleeding again. Is this normal? I know it is normal to have abnormal periods and spotting a while after insertion but has sex induced the bleeding for anyone else? There is no pain after sex and it isn’t just spotting, I will bleed for a few days after and I’m not sure if this is just an abnormal period or if the sex is making me bleed.