Implantation or other

So my period was from June 30th till July 4th. I recently miscalculated that. Anyways I started to spot today. I'm not supposed to ovulate until next week. Is it possible that I am pregnant?

Also I did suffer a miscarriage over memorial day weekend so I'm unsure if that makes a difference.

I've been tracking my ovulation and everything comes up as "you are almost there, you can start trying"

We have been trying a LOT lately.

So is it possible I could be pregnant?