Intermenstrual spotting. Test done?

I am 32 yr old woman...i got copper t inserted almost 3 years back..ever since then i had normal cycle..but there has always been random spotting between the cycle every now n then..however it didnt occur in every cycle..since 3-4 months back it happened frequently so i saw my doctor who did a pelvic exam kn which she found out cervical erosion..she also did the pap smear test and Hpv testa month back..both the tests came out negative..she prescribed me fheal pessary for erosion and it got healed by 90 percent as the doctor checked on the next visit but the spotting happened again and now it occurs pretty frequently..however, its just a tinge of blood mixed with discharge mostly..so on the previous visit, she prescribed me transvaginal ultrasound, in which it was found that the copper iud has moved to lower uterine cavity..could this random spotting be bcoz of that..bcoz both the scan and papsmear hpv are clear..or do i need to get another test done? Attaching the report n spotting pic