One day long periods?

I was on murena IUD for 5 years. Wonderful product. I took it out in October(2012). Novembers period was normal immediately. 3 days of my period. Just like it was pre-iud. December was odd....only one day long. OK, OK its the IUD messing with me post removal. But Januarys period was also one day!!???...started in morning and by the following morning it was MIA! Need advice! I'm 25, I'm married, mother to a 7 year old doll & my hubby and i use condoms.