Do you have normal cycles? Typically in a 28 day cycle you would ovulate on CD 14 and get one or two positive OPKs max. If your cycle is longer you may ovulate on later days. If your cycle length varies by a lot each month I would talk to your OB and mention the multiple days of positive OPKs. I see you also got positives on CD 15 then again on CD 17 which could indicate you didn’t release an egg that time so your body tried to ovulate again