Opk as hpt ..used for progression purposes

I've been absolutely terrified of another early miscarriage and as pregnancy tests are to expensive to be using everyday I used some opks I had spare. I've had my pregnancy confirmed with 5 pregnancy tests first so I know the opks are not second surges etc. Can anyone reassure me that my lines are looking okay? I found out I was pregnant 8 days ago now and I'm either 18 or 17dpo today, the darkest opk at the bottom was most recent today. Thank you xxx