This is exactly how my ocd manifests and it’s horrible. I had a particularly bad time a year ago and cut loads off, after being so proud to finally grow my hair out. So I remember being just where you are. I kept crying, I was so disappointed in myself. It was awful.
An important points to remember, which helped me
You cut your hair, not yourself. This may seem silly but in retrospect there are much worse things you can do during a breakdown or a stress when you become fixated on an issue. Cutting your hair, while it impacts self image and esteem, is the lessor of a lot of possible evils. The hair will grow back.
Now, go and get your hair cut by a good professional. Treat yourself with it. If possible, make regular (or semi regular?) visits. Have the next appointment lined up. Yes, even if you’re growing your hair out. It’s important. Then when you have the urge to cut you know “I have two weeks until my professional cut, they will make sure I’m happy with it at every stage of the grow out process”
I find that as soon as I delay my real cut I get twitchy with the scissors.
Next, get rid of any hair cutting scissors and if there are other scissors you might use get your partner to hide them. If you don’t feel this is necessary, it’s fine. But I found it helpful particularly when I was overwhelmed with the need to use them.
Lastly, take steps into looking after your hair. Regardless of it helps your grow back journey, it’s about helping you feel better about your hair in general. Get a bonnet to sleep in if you don’t have one already, get some oils and oil your hair (even once a week the night before a wash, it does wonders for hydration and does help promote growth) and that way you are taking action to your hair without cutting or damaging it. You’re healing it. and yourself. 💐