Double ovulation?

I had a positive OPK on Monday, CB Digital with solid smiley. Tested again Wed, neg with empty circle. My BBT dropped by .5 degree C on Friday , was bummed out. Had my acupuncture appointment that morning and she said that there was definitely something still happening. She thought I was getting ready to ovulate again. Took CB OPK last night (fri) and there was a flashing smiley, same again this morning. Has this happened anyone else or am I just getting my hopes up unnecessarily and I'm really just not about to ov again. Thanks