What’s going on?

I was on Depo for 5 years. Just got off in April of 2017.. Couldn’t get my period so I went on birth control to help me get one. Stopped taking it after 2 weeks. Got a fake period a week after and then a month later finally had a real period after 8 months. On December 10th. It lasted 6 days. Had sex on December 31st/January 1 & my next period was to come on the 7th of January.. Had mild cramps inJanuary 10th. But yet my period is still not here.. Is this a chance of pregnancy or is this normal after coming off of the Depo shot?