First response....always a faint positive??

Lauren
Ok so this is my story....on 10th May I had a miscarriage. The baby stopped growing at 7weeks but I miss carried at 11weeks after conception. A few weeks later I did a pregnancy first response and was v v v faint positive. Turned out is was old HCG not a new pregnancy
Fast forward to 22 June and I had my first period since MC. 2 weeks later (approx 7th July) I ovulated based on EWCM and a positive opk
I've just taken a first response and again I have a vvvv faint line. Do first response always display a vvvvv faint line even when not pregnant???
See my image and let me know what you think. I will retest in 2 days but just wondering if anyone else has experienced a vvvvvv faint positive with first response even when you're not pregnant. 
Thanks in advance ladies :) xx

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