Ovulating but no fertile cm

Br
Ok ladies please give me some awnsers this was my first cycle using opk I got a positive yesterday (Saturday) which means I should be ovulating today ig but only got to bd Thursday and Friday and most important i never get the egg white cm it stay creamy 😩😩😩 do yall think Thursday and Friday sperm will have survived long enough n my nom fertile cm and secondly why wont my cm change?!