ovulation question

is it possible to ovulate twice? according to glow I ovulated yesterday. the day before glow said I was going to ovulate I had a temp of 100, yesterday my temp was 97 but I was nauseous & crampy on one side so I'm assuming I ovulated then? then today I'm crampy on the the opposite side? still lower temp?. fertile window is 2-8 so today would be my last fertile day? idk