Ttc Can i ovulate 8 days before expected AF????

kat • * <3 *

Literally just started ttc our second :) Our son happened by surprise so I have no experience actually trying. Anyway, my cycles are usually regular about 31 days. My last period was May 17-21 so I assumed I'd ovulate around June 1st. So on June first , we bd'd. then yesterday June 10 I took an OPK n it was positive?? (and bd again this morning) Does this mean I ovulate a week before my period??? Thanks in advance.