Am I at risk of refeeding syndrome if I binge over Christmas?

Been eating around 600-900 calories a day for the past few months, with the occasional binge days of having around 2000 calories. I currently weigh 88lbs/6 stone 4 and I'm 5'0 tall, 21 years old. I'm at uni rn so I can eat according to my own schedules but when I go home for Christmas I'm planning to not follow any diet for the two weeks I will be home and just eat/drink whatever I want whenever I am craving it or feel hungry. I know from past experiences that if I suddenly stop restricting I will can eat around 3000 calories a day. I'm worried that the sudden massive calorie increase will cause damage to my health such as refeeding syndrome

refeeding syndrome only occurs when you are malnourished if you think you are malnourished that says a lot about your diet. If I was you that would be more of a concern than eating the 3000 calories when you get home. You’re weight is worryingly low. My advise put on weight, my other advice is not to ask student room and instead speak to a medical professional as you’re relationship with food seams unhealthy from this short post.

Have you talked to a doctor about your concerns, including detailing your current dietary intake?

No and I don’t really intend to

No and I don’t really intend to

I’m seeing a doctor about other stuff when I go home but I’m not trying to put weight on (other than the weight I will inevitably put on over Christmas but I lose that again when I’m back at uni)

6 stone 4 for a fully grown adult is concerning

Well then what is the point of this thread?
TSR can't provide medical advice and if you don't intend to seek medical advice from a medical professional this thread serves no purpose.

I’m seeing a doctor when I get home, I’m just not looking to gain weight

I’m 5’0

Except that's not what I asked.
You are purporting to be at risk of a condition that apparently occurs if you are experiencing starvation and/or severe malnutrition.
In order to be assessed for this syndrome, you would need to see a medical professional and tell them about your current dietary intake to demonstrate you are in fact experiencing starvation or severe malnutrition and meet any other criteria, to be diagnosed with that or identified as being at risk of that.
You'd then need to follow whatever their treatment/management plan is.
If you're not willing to see a medical professional and disclose that information then it's really besides the point to ask on TSR whether or not you're at risk as you have no way of finding out.

I probably am malnourished, I’ve stopped getting periods. But the treatment for it is just to gradually increase your calorie intake instead of all at once

I think you should rethink posting something like this for anyone to see - especially when the site is targeted for students which could potentially be a lot younger than u are and therefore vulnerable to this kind of content. Talking about weight/calories can be incredibly triggering for some individuals especially if they are not expecting to see something like this come up (an education/student forum) I am in no way saying this is what you intended but just a bit of advice to ensure everyone keeps safe

Then go to your doctor and have that conversation with them.

The site has options to post about health/mental health, and you can very much guess the content of the post from the title, it’s not my fault if someone chooses to click on it

I won’t get a chance to before Christmas because I’m not in the UK atm