Sometimes is SOOO god damn annoying to have irregular periods, WHO ELSE WITH ME ?!?

I just want to ask you guys how can I deal with it how can I fix it WITHOUT using birth control pills because I suffer from anxiety and like I can't , I remember when I took plan b and my period took a month to come I was soooo upset and just breaking down,

So I am in a relationship, obviously in a relationship there is you know sex

( I always use a condom girls and he pulls out)

But the only thing that is my problem is that I have anxiety and I'm always thinking I am pregnant🤦🏻‍♀️🤦🏻‍♀️

Then when my period comes is like a weight lifted of my shoulders 🤣

But then u have sex again and you still have anxiety 😒😒 my life is a mess

So I just need to know how to fix irregular periods like please help 😌 thank you for reading