Ugh period is SO irregular I don't think I'm ovulating!!!

B • Mommy of one 💜
I have no idea when I am suppose to get my period it's always different sometimes shorter but mostly longer than normal! It's so frustrating because I never know if I am ovulating or not! I don't think I am! 😢 we are ttc but it's not happening because of this! Any advice that could help? Thought about trying pregnitude...