marina advice?

Leeanne • Mother of a beautiful baby girl Maci born 29/09/16 💕
I have the coil but over the last few days I have been having light cramps and very light bleeding, like just when I wipe but it's stopped, only lasted a day or so, and now I can't find the strings to make sure is still in place. I also over all just feel shit very hormonal as crying a lot which is how I felt when I first got pregnant with my daughter? Anybody had this with the coil or is there a chance it could of fell out without me realising? I feel confused about the whole situation, I don't think it would be late enough for me to take a test so just wanting some opinions! Thanks! 
Also I have had the could for over 6 months and have had normal regular periods since getting it!