Missed period

Amber

My period is one week late. I had my mirena birth control removed March 13,2018. In April I found out I was pregnant and ended up miscarrying. Since then my period has been on time every month. Never later than the 19th. I have taken several pregnancy tests and they are all negative. I’ve been cramping like I am going to start my period. Should I be concerned and go to the dr or just wait to see what happens?