Ttc positive opk on cd 20

Kara

Hi so I'm not too sure when I exactly ovulate as I've never tracked before. I had the mirena removed may 24th and had my last period from 6/29-7/5. We are trying for #4. I am currently on cd 20 and got a steady smiley face yesterday. I tested this morning and got a smiley face again along with two solid lines. Could It be possible to ovulate this late? If so could I still have a chance of getting pregnant? My cycle last month was 31 days.