I had my IUD taken out Feb 2, lmp a few days later on Feb 5 (so I'm 5w1d). I started spotting March 7 and took the first test a few days later which was positive. I took another to make sure, also positive. Took a third two days later which was both positive and darker in color. Spotting stopped but then started again after my DH and I would have sex. This time it's dark red or sometimes light red/pink and lasts for a few hours but gets really light within a day or goes away all together. It is never heavy enough to soak a pad even after several hours. Right after we finish having sex it's enough to require a few wipes but after that it'll be the size of a quarter or less each hour.