Can’t find strings

lexi • 19 & starting college to be a RN in September Olivia Elizabeth Llewellyn 💕

I’ve had my iud for about a year now & over the last few weeks every time me & my SO try to have sex I bleed 🙄 during the day I have such light spotting all I need is a liner so this morning I decided to try to find my stings to make sure it’s still hangin in there & I can’t feel them, but I’ve never really been able to feel them since I got it. Should I be worried or is that normal?