Should I test?! ⁉️😱

Mikayla
I had a baby 5-27-15 my first period after her was 7-3-15 and ended 7-6-15. Next period was 7-30-15 and ended 8-1-15. Next after that was 8-18-15 ended 8-21-15. I'm 18 dpo, should I test or wait longer?!