Irregular period help

Natalie
Hey guys! My periods have never been regular. I have to be on birth control for them to be regular. We are ttc but I just had a period that lasted for a month and then I was off it for a few days and it looks like it's starting again. Is there any way I can get my period regular without bc? I know you can get pregnant on your period but it's harder and with how my period is I don't ever know when I'm ovulating. Please help!