Slight positive opk? Cd7

•Jade•
Hi ladies really confused this morning.
​ Took my first opk today after coming off my period on tue. I'm on CD7 and this is what the opk looked like. 
​I'm on a 28-29 day cycle and I had positive opk's last month on cd13,14,15  
​Could it just be a faulty test or am I getting ready to OV this early!?
​Will test again on my dinner this afternoon. I did BD last nyt luckily ha. 
​Thanks girls.