Hi thanks for your question
Your are using multiload device for
contraception.
Your partner feels it, Yes normally your partner can feel its thread, but not the coil, as coil is inside the
uterus and only thread comes out from the uterus and can be felt in vagina.
Yes it can migrate from the uterus and can come dawn from uterus into
cervix and vagina, where your partner can feel it.
Your test came positive (you have not mentioned which test, probably
pregnancy test), then disappear,(again not mentioned ,what disappeared,).I presume the positive bar on pregnancy kit, which can happen sometime..
It is better for you, to get your pregnancy test from a laboratory.
Pregnancy can occur while multiload in place.
In cases where multiload get migrated,chances are more to get migrated.
As ,your case may be.
Hope I answered all the queries.