Irregular periods

I’ve had irregular cycles my whole life. I went on birth control and now I’m off because we’re TTC. I’ve been off since December 2017. My cycles vary every month and are anywhere from 30-36 days.

Has anyone gotten pregnant with irregular cycles? How? I’m really nervous about it because I don’t know when/if I even ovulate. I have no egg white cervical mucus and I hardly have a sex drive anymore. I used to get really aroused and I had a high sex drive but I don’t anymore.

What’s going on with me? Will I be ok? I’m really nervous and it’s stressing me out.

Please help.