Period

I'm trying to get pregnant again I had a miscarriage in June 2015 my baby due date would have been January 26 2016. I received my first period after the miscarriage on August 16 2015 and for the following two months after it came on the 17th. But however in november it came three days late and in december it came 5 dates late but before it actually came I had spotting two weeks before. It is now February and my period finally came on on the 6. Could someone help me understand what's going on