Egg White CM (possibly TMi but no pics)

Charlotte • Hoping to try for baby #2!
I just had a positive OPK but have had NO egg white CM this month yet. In the past I've had quite a lot of EWCM... I read somewhere that CM is affected by the amount you drink. BUT in order to do the OPK I had to do a 4 hour hold which meant restricting liquid - anyone else? Is there a way of making more EW come? Or am I not ovulating yet?