I had a very weird period last month and wasn't very well at all with it so I didn't monitor ovulation around my usual time. On cd 29 I got tonnes of ewcm so thought I would do a opk and it was positive (I'm thinking I just had a messed up cycle). Anyway, that test was positive for 4 days (morning and evening tests). So when did I ovulate? Was it 12-36 hrs after my first surge or will it be now the surge has gone?