5 days ago I got a very faint pink line on a couple of internet cheapies. I've taken a FRER and Sainsbury's test but both of those came back negative (the Sainsbury's one did have a faint blue line but it was after the 10 minutes). I've just tried another cheapie test and there is a very, very faint pink line again but no stronger than the one from 5 days ago. Does it sound like it could have been a chemical pregnancy?