I was on Depo from 02/26/2016 until 01/22/2017. I started the Nuva Ring on 01/23/2017 and decided to stop using it on 02/03/2017. My last period was 02/25/2017 and lasted 7 days. I still have not gotten a period since feb 2017. I have done numerous at home tests and all came back negative. I also did a test at Planned Parenthood and that came back negative. Could I still be pregnant?