IUD string feels longer

Baylee

I got the Mirena 2 weeks ago and I stopped bleeding week and a half after. My boyfirend and I had sex and it was slightly uncomfortable but i just asaumed my body was still getting used to the IUD. The next day I started spotting again and I noticed that the IUD strings seemed very long. Before they felt like 2mm poking out the cervix. Now it feels like 1.5 inches. Should I call my Dr? or wait a week?