Trying to figure it out

Brittany • I am 26 and my husband is 28. Newly married in may 2015. I am a special education teacher and my husband works with lawn care.
I was on the depo for 4 years. Stopped my injections in July due to being newly married and wanting to try for one of our own. (I have two kids from previous relationships). I got my period for 7 days from Oct. 5th-12th. Haven't gotten it yet fr this month. Could it be just irregular because of stopping the injections?