Here I am to learn and understand my cycles

I have some questions, pls help me out:

- can i ovulate w/o EW CM?

- how long can sperm survive under NONideal circumstances?

- can i conceive w/o EW CM?

- wich one is better BD in the evening or morning?

- after take off the BC pill is it normar to get longer cycle month by month? (I think it would work in the opposite way)

- how often do you have anovulatory cycles and consider as normal?

- does it anovulatory cycle if i have pos opk but my temps rise only after about 5-7days?

Thank you ladies for your response and baby dust all of us! 2020 is our year! ♥️