Came off my "period" 5th April, my iud coil fell out on the 14th, wanted to go get another fitted but was told to test before I turn up. Tested with first response on the 17th which was positive tested again on the 18th which was fainter barely visable

..Since then some positive and some negative tests my AF is due again today and no sign so far. Can any one shed some light? Sorry for the tests being old but didnt take pictures of them at the time.