Yes, stop the EPO once you've ovulated. It's good for CM, but it can make your uterus contract and cause problems with implantation.
Last month, I didn't ovulate, so my body gave up on it and period came sooner than usual. It's normal to not ovulate once or twice a year.
My cycle was more normal this time, without all the weird back and forth CM, so I'm hoping that means it is my normal pattern and I ovulated yesterday. The only difference from my usual pattern was it was all watery rather than EWCM. No idea why... My temps usually gradually climb after O, but I had a rough night last night with interruptions from the cat and the shower curtain rod fell and scared me to death...and it was hot in here, so that may be the reason for the high....although when my sleep is interrupted in my LP, my temp is usually lower. So gotta wait for a few days to see. Hate that wait!!!