Brown discharge mid-cycle!! Am I back to normal after Depot!?

Kelly
Hi everyone!
So I was on the depot injection for 3 years and I had my last injection May 2016! My first AF came back this March, 10 months later! This first AF was very brown and worrying in colour. It was back to normal in March and April though and I had 28 day cycles. 
We have been TTC for ages now! I wish I'd come off depot so much sooner if I'd have known it would take this long for my body to return to normal. I've been using the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> and we are very conscious of when I am said to be ovulating etc...
So I have been hoping and praying this is the month! Only today I have had brown end-of-period-like discharge and cramping. I thought I started my period and almost cried but it's not due for 7 days (7th June). 
Anyone know what this brown discharge and cramps could be? Anyone experienced the same? 
Thanks!