A portion of the stitches is open... is this normal? (Photo)

I got mohs surgery 10 days ago on my forehead. I noticed after 1 week that a part of the stitches were opening. I went in to my doctor's office the next day and he said it looked fine. Now just 4 days later, it's opened twice the size. Is it normal that the stitches are opening? I'm worried that it won't heal nicely and I'll end up with a nasty scar. I've been cleaning it twice a day, applying aquaphor and covering it. Did the doctor mess up my stitches? Is there anything I can do?

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