can i be pregnant still

nicolle

this is my chart and i didn’t have unprotected sex at all in august but since the 25th ,26,27 ive has pink and brown spotting then went away but since the 25th ive had lots of nausea and throwing up. i know it could be ovulation spotting and could be just ovulation sickness but is there any chance at all i could be pregnant cuz i didn’t have sex ?