Clomid Ovulation confusion

J

So anytime I take Clomid my periods come a week late and I ovulate the day after my period ends. Last cycle I got a positive ovulation test the day after my period ended and we bd’d a lot. I still kept testing after that and a few days later got another positive opk, that same day I went to see my doctor and he said he didn’t see any follicles so I probably already ovulated. I have been using the strips and digital opk’s and they both read the same. Why would I get a positive more than once? Anyone have any ideas? I’m usually very regular every month when I’m not on clomid, this is our 10th month ttc. Help!