Help please

Deetta
Hello everyone so this is my first time on here. I am confused about my cycle. So i started my period april 26th lasted 4 days. My usual cycle is 6 days. Then i started again may 13th. I was not suppose to start again untill May 23rd today. Should i be worried about my periods being so close together. And if i don't start should i take a pregnancy test. This has never happened to me before