I'm insulted

Sorry to tell you this, but your parents are jerks. Honestly, I'd cut it myself.

 

Consider: Your parents, not you, are the ones who would be bothered by you having short hair. If you are okay with a buzzcut for a while, go ahead and cut it -- if they then make you shave it completely, they are only punishing themselves.

It's fine if you decide not to cut your hair right now because of your parents. Do what you need to do in order to stay safe and keep them happy, if that is what is best for you right now. It sucks that they won't let you cut your hair but it doesn't invalidate anything about you, and you will be able to control your own style one day. If there's other, smaller things you can change in the meantime, go for it.

If you want to cut your hair now, could you maybe find photos of beautiful women with short hair (Emma Watson is my go-to example here), or would your parents consider them ugly anyway? Could you point out that it's your hair, and it's kind of weird that your parents are so invested in you being beautiful? Could you say you are tired of caring for long hair and it has nothing to do with wanting to look different and/or with being bi? I think this is one of those times where it's okay to lie in order to cope, if you think that is the best option for you.

 

I've been through the same thing, over and over again. I'm not out as trans so my parents treat me like I'm a girl, and they used to tell me how unattractive I'd look with short hair and that nobody would like me because I'd look like a boy etc, to which I secretly celebrated but that's besides the point. Eventually I got it cut myself. Although my parents spent the first week taunting me about how terrible I looked and how everybody was repulsed by me (they even managed to make me ashamed of it for several days), they eventually began complimenting me on how good I looked. Even with the short hair.

If your parents' approval matters to you so much, know that they'll warm up to your short hair in due course. But try not to hold your parents' opinions in such high regard, because they are indeed jerks, like iiimee said. Having said that, if they threaten to do violence then that's a different story.

 

How exactly would they punish you? Would they physically force you to shave your head? If so, how?

 

I did and it's the best thing I've ever done. Try convincing them but stay safe

 

I see... Well, do you think it would be possible for you to hold back from cutting your hair until the pregnancy is over? I had to delay cutting my hair because of upcoming interviews (under my mum's insistence) but a good time for the haircut did come around eventually.

 

Fair enough. To be fair I didn't need to wait for too long, which was good because I don't have much patience either. But before you go ahead and cut it, is there any way that you could convince your parents to loosen up to the idea of a haircut, even if only by a little?

 

It's always worth a shot. Keep in mind that they may refuse at first, but you've just got to persist... With caution, of course.

 

Good, you'll need persistence more than anything else at this point.

 

Give that a try, but be gentle as well as persistent. You don't want to give your mum any more reasons to prevent you from getting the cut. Good luck