No signs of ovulation on letrozole...

So I'm CD15, 1st round of letrozole and I have zero signs of ovulation... havent done this before so I dont know what to expect. I'm taking letrozole to "boost" ovulation as I dont ov regularly. When I do ov its generally about CD17

Generally ill get ewcm, feel more turned on, happy/positive etc from about CD12. I just want to know if it is normal to not have my usual ov symptoms? I got one wee blob ewcm on CD11 and nothing since then.

*i havent checked cervical position this cycle*