No period?

_.B._ • 6.13.15 💍 - Mother of 5 🚼
I had my son on 4/19 he was our 5th we decided to have the tubaligation done the day after delivery. I bleed for 11days and here over a month later I have still yet to get my period. With all of my other children I got my period 2 weeks after I stopped bleeding from giving birth. 
Has anyone else not gotten their period? Should I call to be checked or is it normal/ not that big of a deal? I don't want to call and sound silly.