So on the 25 af was due but on the 23 I started spotting thinking I started. Went to change my pad four hours later and there wasn't any blood. On the 25 the same thing happened. Then again on the 26 and now I have been bleeding very little as if I'm just spotting when normally I should be having really heavy blood flow. I took a pregnancy test and it was negative. Has this happened to any of you.