Another miscarriage?!

Hello i miscarried Febuary 18th this year. I startes my first cycle on March 27th. I am 10 days late as of today and i have lower back pain and fatigue. I took a pregnancy test on Thursday and saw a faint line. This morning (sunday) i took a digital one and said negative. I am so confused and sad. Was it a chemical pregnancy or early miscarriage?